Free online calculators for Bangladesh &amp; worldwide

📋

Income Tax BD 2025-26

NBR updated slabs

🏦

EMI Loan

Any loan, any bank

🏗️

Building Cost

Foundation to finish

☀️

Solar Panel BD

Panels, cost & savings

📐

Land Area Converter

Katha, Bigha, Decimal

📅 Everyday Calculators

Finance, bills & travel — tools you reach for every week

40 tools

Global

EMI Loan Calculator

Monthly instalment, total interest & amortization for any loan.

2025-26

Income Tax Calculator BD

NBR 2025-26 slabs, exemptions, rebate, minimum tax & AIT.

Salary Calculator

Estimate monthly and yearly take-home salary after deductions.

VAT Calculator BD

Add or extract 15% NBR VAT. All Bangladesh VAT rates supported.

Zakat Calculator

2.5% Zakat on net wealth above Nisab. Cash, gold, savings & debts.

FD / DPS Calculator

Fixed Deposit and DPS maturity amount, interest earned and monthly savings — all BD bank schemes.

Compound Interest Calculator

Compound interest with yearly, quarterly, monthly or daily compounding. Inflation-adjusted real return.

Gratuity Calculator BD

Bangladesh labour law gratuity — 30-day last salary per year for 5+ yrs. Instant breakdown for employers & employees.

TDS & VDS Calculator BD

Estimate Bangladesh withholding tax (TDS) and VAT (VDS) on vendor bills. Fully NBR compliant.

Prepaid Meter Calculator BD

Convert prepaid recharge amount to units (kWh) after utility charges. Supports DESCO, DPDC & BREB.

L/C Cost Calculator

Estimate bank commissions, transmission, SWIFT, stamp duties and VAT for opening import or back-to-back L/Cs.

Sanchayapatra Calculator

Calculate monthly, quarterly, and maturity returns on Bangladesh Savings Certificates. Estimates slabs and tax.

Freelancer Hourly Rate Calculator

Convert target salary to freelancer hourly rate factoring in expenses, taxes, unpaid leave, and billable utilization.

Gold Price & Buying Cost

Calculate gold jewellery price in Bangladesh — weight conversions, BAJUS rates, making charge and 5% NBR VAT.

Remittance Cash Incentive

Convert foreign currency and calculate the 2.5% government cash incentive + bank bonuses for remittances.

Prepaid Gas Bill & Meter

Calculate prepaid gas meter units, recharge breakdown, and remaining days for Titas Gas and others.

Crypto Profit & Loss Calculator

Calculate net profit or loss, ROI percentage, fees and break-even price for any cryptocurrency trade.

Sukuk Bond Tax & Yield

Calculate profit payments, NBR tax rebate, net investment, and effective yield for Bangladesh Government Sukuk bonds.

Universal Pension Scheme

Estimate monthly lifetime pensions for Bangladesh Universal Pension Scheme (Pragoti, Probash, Surokkho, Samata).

Faraid Inheritance Calculator

Calculate Islamic inheritance shares for wives, husbands, sons, daughters, fathers, and mothers under Hanafi law.

Updated

Trip Cost Calculator

Bus, train, plane, ship or car — full trip cost with passengers.

Fuel Cost Calculator

Estimate fuel expense from price, distance and mileage.

Mileage Calculator

Find vehicle mileage from distance covered and fuel used.

Car Import Duty Calculator BD

Bangladesh car import duty, supplementary duty, VAT and advance income tax on reconditioned and new vehicles.

CNG & LPG Conversion Cost Calculator

Estimate CNG and LPG conversion costs, compare Traditional and Sequential kits, check company-wise charges, find the best installers in Bangladesh, and calculate break-even period.

CNG & LPG Calculator Hub

Full CNG & LPG resource hub — tank capacity, refill cost, fuel savings, break-even, cost per km, and FAQs.

EV Charging Calculator

Estimate EV battery charging time and session cost based on battery size, charging power, efficiency, and electricity rates.

Hajj & Umrah Budget Planner

Estimate flight, accommodation, meals, Qurbani, visa fees and convert BDT/SAR budget for Hajj and Umrah packages.

Age Calculator

Exact age in years, months, days. Next birthday countdown & zodiac.

Unit Converter

Length, weight, temperature, area, volume, speed and data units.

Date Difference Calculator

Days, weeks and months between two dates. Working days included.

Percentage Calculator

Three modes: X% of Y, X is what % of Y, and % change.

Currency Converter

BDT to USD, EUR, GBP, INR and 30+ currencies with live rates.

Discount Calculator

Sale price after discount, discount %, or find original price.

2026

Internet Bill Calculator BD

Carnival, Link3, Amber IT, DOT, BTCL, Triangle, MiME & mobile data.

AC BTU Calculator

Right-size your air conditioner — room BTU load from area, ceiling height, insulation, climate and occupancy.

Dhaka WASA Water Bill Calculator

Calculate monthly water and sewerage bills for Dhaka WASA residential and commercial metered connections.

Date Converter

Convert Gregorian (English) dates to Bangla, Hijri, Persian, Hebrew, Chinese, Indian Saka, Thai, and Japanese calendars.

NID Age Checker BD

Extract birth date and calculate exact age from Bangladesh 17-digit or 13-digit NID number. District and eligibility check.

Cattle Weight & Qurbani Share

Estimate cattle live weight and meat yield using heart girth & length, and split sharing costs among up to 7 shareholders.

🏗️ Construction & Material Estimators

Building cost, concrete, paint, tiles, floor, brick, plaster and steel — all in one place

8 tools

BD rates

Building Construction Cost

Full itemised cost — foundation to paint. Economy to premium grade.

Concrete Calculator

Volume, cement bags, sand & aggregate for any slab or column.

Paint Calculator

Litres, tin count & cost for any room. Multi-room & multi-coat.

Tile Calculator

Tile count, wastage & cost. All standard sizes — BD & global.

Floor Material Calculator

Ceramic, marble, granite, vinyl, laminate, wood, epoxy & more.

Brick & Mortar Calculator

Brick count, cement bags & sand — BD, UK, US, Indian brick sizes.

Plaster Calculator

Cement & sand for internal, external or ceiling plaster.

Steel Rod Calculator

MS rod weight in kg & tonnes. All diameters 8–40mm. Cost estimate.

☀️ Solar & Energy Tools

New

Plan your solar setup — panels, savings, batteries

4 tools

Solar Panel Calculator

Panel count, wattage & cost for your home or business. BD & global.

Solar Savings Calculator

Monthly savings, payback period & ROI from solar installation.

Solar Battery Backup

Battery size, backup hours & bank capacity for off-grid or hybrid.

Electricity Bill Calculator BD

Bangladesh electricity bill using BPDB 2024 slab rates.

🏃 Health & Fitness

BMI, calories, BMR, macros, protein, water intake and sleep — educational tools

20 tools

BMI Calculator

Body Mass Index with WHO classification and healthy weight range.

Ideal Weight Calculator

Healthy weight range using Robinson, Miller and Hamwi formulas.

Calorie Calculator

Daily calorie target for weight loss, maintenance or muscle gain.

BMR Calculator

Basal Metabolic Rate — calories your body burns at rest.

Water Intake Calculator

Daily water intake by weight, activity and climate.

Sleep Calculator

Best bedtime and wake time based on 90-minute sleep cycles.

Body Fat Calculator

Estimate body fat % using Navy method or BMI method.

Macro Calculator

Daily protein, carbs and fat targets for your fitness goal.

Protein Intake Calculator

Daily protein goal by bodyweight, activity and fitness objective.

TDEE Calculator

Total Daily Energy Expenditure — maintenance calories with activity.

Pregnancy Due Date Calculator

Estimate your baby's due date from LMP or conception date. Trimesters, milestones, key appointment weeks.

Ovulation Calculator

Predict fertile window and ovulation day from your last period and cycle length.

Waist-to-Height Ratio

Cardiometabolic risk screen using waist circumference divided by height. Supports cm and inches.

One Rep Max Calculator

Estimate 1RM strength from reps and load using Epley, Brzycki, Lombardi and other formulas.

Heart Rate Zone Calculator

Five personalised training zones from max heart rate. Choose Karvonen (HRR) or percentage-based method.

Lean Body Mass Calculator

Lean mass in kg or lbs from weight and body fat %, or via Boer / James / Hume formulas.

eGFR Calculator

Estimate kidney function (eGFR) using the CKD-EPI 2021 equation — creatinine, age, sex and race-free.

Chinese Gender Predictor

Predict your baby's gender using the Chinese lunar calendar age and conception chart.

Quit Smoking Calculator

Estimate money saved, cigarettes avoided, and track your physical health recovery timeline after quitting smoking.

Child Adult Height Predictor

Estimate your child's future adult height based on current growth percentiles and parental heights.

🇧🇩 BD Specific Tools

BD Only

Land area, Zakat, GPA/CGPA, VAT — built for Bangladesh

30 tools

Global

EMI Loan Calculator

Monthly instalment, total interest & amortization for any loan.

2025-26

Income Tax Calculator BD

NBR 2025-26 slabs, exemptions, rebate, minimum tax & AIT.

Salary Calculator

Estimate monthly and yearly take-home salary after deductions.

VAT Calculator BD

Add or extract 15% NBR VAT. All Bangladesh VAT rates supported.

Zakat Calculator

2.5% Zakat on net wealth above Nisab. Cash, gold, savings & debts.

FD / DPS Calculator

Fixed Deposit and DPS maturity amount, interest earned and monthly savings — all BD bank schemes.

Compound Interest Calculator

Compound interest with yearly, quarterly, monthly or daily compounding. Inflation-adjusted real return.

Gratuity Calculator BD

Bangladesh labour law gratuity — 30-day last salary per year for 5+ yrs. Instant breakdown for employers & employees.

TDS & VDS Calculator BD

Estimate Bangladesh withholding tax (TDS) and VAT (VDS) on vendor bills. Fully NBR compliant.

Prepaid Meter Calculator BD

Convert prepaid recharge amount to units (kWh) after utility charges. Supports DESCO, DPDC & BREB.

L/C Cost Calculator

Estimate bank commissions, transmission, SWIFT, stamp duties and VAT for opening import or back-to-back L/Cs.

Sanchayapatra Calculator

Calculate monthly, quarterly, and maturity returns on Bangladesh Savings Certificates. Estimates slabs and tax.

Freelancer Hourly Rate Calculator

Convert target salary to freelancer hourly rate factoring in expenses, taxes, unpaid leave, and billable utilization.

Gold Price & Buying Cost

Calculate gold jewellery price in Bangladesh — weight conversions, BAJUS rates, making charge and 5% NBR VAT.

Remittance Cash Incentive

Convert foreign currency and calculate the 2.5% government cash incentive + bank bonuses for remittances.

Prepaid Gas Bill & Meter

Calculate prepaid gas meter units, recharge breakdown, and remaining days for Titas Gas and others.

Crypto Profit & Loss Calculator

Calculate net profit or loss, ROI percentage, fees and break-even price for any cryptocurrency trade.

Sukuk Bond Tax & Yield

Calculate profit payments, NBR tax rebate, net investment, and effective yield for Bangladesh Government Sukuk bonds.

Universal Pension Scheme

Estimate monthly lifetime pensions for Bangladesh Universal Pension Scheme (Pragoti, Probash, Surokkho, Samata).

Faraid Inheritance Calculator

Calculate Islamic inheritance shares for wives, husbands, sons, daughters, fathers, and mothers under Hanafi law.

Land Area Converter

Katha, Bigha, Decimal, Sqft, Acre, Hectare — BD & global land units.

Land Measurement Calculator

Calculate plot area from dimensions. Rectangle, triangle and L-shape.

Plot Size Calculator

Net buildable area after RAJUK setbacks. FAR and floor area.

Rent Split Calculator

Fair rent division for 2–8 roommates. Equal, by room or by income.

Land Registry Calculator

Calculate land and apartment registration fees in Bangladesh — stamp duty, gain tax, local gov tax and VAT.

GPA / CGPA Calculator

SSC, HSC & University GPA on Bangladesh 4.00 and 5.00 scale.

Percentage to GPA Converter

Convert exam percentage to GPA for SSC, HSC and university.

Study Time Calculator

Plan exam preparation — subjects, pages and daily schedule.

Weighted Grade Calculator

Calculate weighted class averages and required final exam target scores.

Z-Score to P-Value Calculator

Convert Z-score to P-value or P-value to Z-score. Includes interactive standard normal distribution bell curve.

👕 Garment Costing Hub

New Hub

Garment costing, CM, FOB, profit margin and export cost — for RMG professionals

10 tools

Garment Costing Calculator

Full garment cost sheet — fabric, trims, CM, overhead and profit.

CM Calculator

Cost of Making per garment — labour, overhead and target margin.

FOB Calculator

Free On Board price from CM, material, agent commission and freight.

Profit Margin Calculator

Gross and net profit margin, markup and break-even for garment orders.

Export Cost Calculator

Total export cost — production, freight, insurance, duty and charges.

SMV Calculator

Estimate Standard Minute Value from observed operation timings, ratings and allowances.

Buyer Commission Calculator

Calculate agent commission and target supplier pricing for garment orders.

Duty Drawback Calculator

Estimate flat rate NBR or actual customs duty drawback values for export orders.

Garment Carton Calculator

Compute CBM volume, empty carton box weight, volumetric weight, and sourcing costs for apparel shipping.

CBM & Container Loading Calculator

Calculate total CBM and estimate carton packing fit for 20ft, 40ft standard, and high cube shipping containers.

🧵 Fabric & Textile Hub

New Hub

GSM, fabric consumption, yarn conversion and fabric weight — for textile professionals

6 tools

GSM Calculator

Fabric GSM from weight and sample area. Verify supplier quality.

Fabric Consumption Calculator

Fabric requirement per garment — pattern pieces, wastage and shrinkage.

Yarn Converter

Convert yarn count between Ne, Nm, Tex, Denier and dtex units.

Fabric Weight Calculator

Total fabric weight for a production lot from GSM, width and length.

Sewing Thread Calculator

Calculate total sewing thread required (meters/yards) and number of cones for any garment order based on seam length, stitch type, and wastage.

Warp & Weft Yarn Calculator

Estimate warp and weft yarn weight requirements and finished fabric GSM for weaving orders.

⚙️ Production & IE Hub

New Hub

Efficiency, SAM, manpower, line balancing, overtime, salary, production targets and capacity planning

13 tools

Efficiency Calculator

Line or operator efficiency — SMV, minutes produced and worked.

Overtime Calculator

Overtime pay at 1.5× or 2× rate — hourly, daily and monthly workers.

Salary Calculator (Factory)

Factory worker salary with attendance, overtime and deductions.

Production Target Calculator

Daily and hourly production target from SAM, efficiency and shifts.

SAM Calculator

Standard Allowed Minutes from operation breakdown, SMV and allowances.

Manpower Requirement

Operators needed to hit a daily target from SAM and efficiency.

Line Efficiency Calculator

Actual vs target efficiency with bottleneck analysis and shift data.

Overtime Cost Calculator

Total overtime cost for the line — per piece and per order impact.

Capacity Planning Calculator

Monthly production capacity from lines, shifts, days and average SAM.

Line Balancing Calculator

Calculate pitch time, balance delay, and balance efficiency to solve bottleneck lines.

DHU Calculator

Defects per Hundred Units (DHU) and defect rate tracking dashboard.

Machine Requirement

Calculate quantity of specific machines needed to achieve target output.

OEE Calculator

Overall Equipment Effectiveness from availability, performance and quality — the gold standard for factory productivity.

🫧 Washing Plant Hub

New Hub

Washing cost, chemicals, water, steam, shrinkage, ETP and boiler — for washing plants

12 tools

Washing Cost Calculator

Total washing cost per piece — labour, chemicals, water, fuel, overhead.

Chemical Consumption

Chemical dosage and cost per kg of fabric for any wash process.

Water Consumption

Litres of water per kg of fabric — normal, enzyme and denim wash.

Steam Consumption

Steam requirement in kg/hr from machine capacity and process temperature.

Shrinkage Calculator

Warp and weft shrinkage % from before and after wash measurements.

Production Capacity

Daily garment throughput from machine count, cycle time and load.

Machine Utilization

Machine utilization % from available and productive hours per shift.

Rewash Percentage

Rewash rate and cost impact — pieces rejected and re-processed per lot.

ETP Cost Calculator

Effluent Treatment Plant cost per m³ — chemicals, power and labour.

Boiler Fuel Consumption

Fuel consumption and cost for steam boiler from efficiency and output.

Softener Consumption

Calculate chemical softener consumption (g/l or % owf) and pricing for fabric loads.

Dye Consumption

Textile dyeing recipe calculator for dyes, salt, soda and color costs.

Why CostNest?

Built for speed, accuracy and privacy

Trusted by users across Bangladesh and beyond

Instant Results

Zero loading time. Every calculation runs entirely in your browser.

100% Private

No login required. Calculator inputs stay on your device.

Works Everywhere

Fully optimised for mobile, tablet and desktop — any device.

Always Accurate

Updated 2026 BD rates and global standards. Reliable every time.

About CostNest

Your free calculator hub for Bangladesh & beyond

Every calculator runs entirely in your browser — no signup, no loading screens, your data never leaves your device.

💰

Everyday Finance

Trip cost, EMI, BPDB electricity, NBR income tax 2025-26, internet bills, fuel, mileage, salary — tools for your daily life.

🏗️

Full Construction Suite

Building cost (economy to premium), concrete, paint, tiles, floor materials, brick & mortar, plastering, MS steel rod.

☀️

Solar & Energy

Panel count, wattage, monthly savings, payback period, battery bank sizing — for off-grid or hybrid setups.

🏃

Health & Fitness

BMI, BMR, TDEE, calories, macros, protein, water intake, sleep cycles, and body fat — for planning, not medical advice.

🇧🇩

BD-Specific Tools

Land Area (Katha, Bigha, Decimal), Zakat with Nisab check, GPA/CGPA for SSC/HSC/University, VAT at NBR 15%.

👕

Garment & RMG Industry

Garment costing, CM, FOB price, profit margin, export cost, SMV, buyer commission, and duty drawback — plus fabric GSM, yarn count conversion, fabric consumption, sewing thread estimation, line balancing, defects (DHU), machine requirement, line efficiency, overtime pay, target production, and washing softener & dye consumption.

Browser private

Inputs stay on your device

Works worldwide

BD rates + global standards

Instant & free

123 tools · no signup

From the Blog

Guides & Explained

Plain-language articles behind every calculator.

All articles

How to Register and Apply for the Universal Pension Scheme in Bangladesh

28 Jun 20266 min

Understanding Faraid: A Practical Guide to Islamic Inheritance Rules (Hanafi Law)

28 Jun 20268 min

Sukuk Bond Tax Rebate & Buying Guide (Bangladesh NBR Rules)

23 Jun 20266 min

Health & Fitness

Chinese Gender Predictor Chart Guide: Origin, Accuracy, and Lunar Calendar Math

22 Jun 20266 min

Health & Fitness

Quit Smoking Recovery Timeline: Health Milestones and Lifetime Financial Savings

22 Jun 20267 min