Free Online Calculators

Fast, accurate calculators for everyday tasks — BMI, percentage, VAT, loans, unit conversions and more. Free, no signup required.

Math & General

%
Percentage Calculator
Percentage of, change, and difference
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⇄
Unit Converter
Convert length, weight, temperature and more
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01
Number Base Converter
Convert decimal, hex, binary and octal
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Finance

🧾
VAT Calculator
Add or remove VAT from any amount
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🏦
Loan Calculator
Monthly payment and total interest
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💳
Tip Calculator
Split the bill and calculate tip
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🏷️
Discount Calculator
Final price after discount
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Health

⚖️
BMI Calculator
Calculate your Body Mass Index
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🔥
Calorie Calculator
Daily calorie needs (TDEE)
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Date & Time

🎂
Age Calculator
Calculate age from date of birth
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📅
Date Calculator
Days between two dates
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