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Age Calculator
Exact age in years, months, days. Next birthday countdown & zodiac.
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General Tools Calculators
Unit conversion, date difference, percentage and currency tools
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Unit Converter
Length, weight, temperature, area, volume, speed and data units.
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Date Difference Calculator
Days, weeks and months between two dates. Working days included.
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Percentage Calculator
Three modes: X% of Y, X is what % of Y, and % change.
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Currency Converter
BDT to USD, EUR, GBP, INR and 30+ currencies with live rates.
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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.
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AC BTU Calculator
Right-size your air conditioner — room BTU load from area, ceiling height, insulation, climate and occupancy.
Everyday Calculation Tools
These general-purpose tools handle the everyday calculations that come up across shopping, travel, study and work. The currency converter uses mid-market exchange rates updated every 24 hours. These rates are the midpoint between buy and sell rates — actual rates from banks, bKash, Nagad or money transfer services will differ.
Percentage calculations are among the most common everyday math tasks: understanding discounts, calculating VAT, finding what portion of a budget something represents. The unit converter covers length, weight, temperature, area, volume, speed and digital storage.
Frequently Asked Questions
How do I convert BDT to USD?
Use our currency converter. Enter the BDT amount, select USD as the target currency. Note that bank and remittance rates will differ from the mid-market rate shown.
How do I calculate a percentage discount?
Discount amount = Original price x (Discount% / 100). Sale price = Original price minus Discount amount. Our discount calculator handles all three discount problems.
How many days between two dates?
Our date difference calculator gives exact days, weeks, months and years between any two dates, including working days.
How do I convert Celsius to Fahrenheit?
Formula: F = (C x 9/5) + 32. For example, 30C = 86F. Our unit converter handles all temperature conversions including Kelvin.
What is the mid-market exchange rate?
The mid-market rate is the midpoint between buy and sell rates. It is the rate shown on Google and financial data services, but not the rate you get from any bank or remittance service.