Calculators
Free online calculators: percentage, ratio, date, unit, math calculators and more. Instant results, no registration required.
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Jump straight to the most relevant tools in this category.
Electricity Cost Calculator
Calculate appliance electricity costs.
Aspect Ratio Calculator
Calculate image and video aspect ratios.
VAT Calculator
Add or remove VAT from any price — instant online VAT calculator, free.
Loan Calculator
Calculate loan payments, total interest, and amortization schedules online free.
BMI Calculator
Calculate Body Mass Index (BMI) with metric or imperial units — free, instant result.
Unit Converter
Convert between metric and imperial units of length, weight, temperature, volume instantly.
Time Calculator
Calculate time differences, add or subtract time periods.
Interest Calculator
Calculate simple and compound interest — compare compounding frequencies online, free.
Random Number Generator
Generate random numbers within a specified range.
GPA Calculator
Calculate your GPA instantly
Hours Calculator
Calculate total work hours with breaks, multiple days, and optional pay — free.
Retirement Calculator
Calculate retirement savings growth and monthly income — free, instant planner.
BMR Calculator
Calculate basal metabolic rate
Fraction Calculator
Calculate with fractions
Percentage Difference Calculator
Compare values with percentages
ROI Calculator
Calculate total and annualized ROI from investment cost and final value — free.
Currency Converter
Convert world currencies instantly with live exchange rates — free, no registration.
Lease Calculator
Calculate lease payments
Debt Calculator
Plan debt payoff strategy
Compound Interest Calculator
Calculate compound interest growth with monthly contributions and frequency comparison — free.
Square Footage Calculator
Calculate area and square feet
Gas Mileage Calculator
Calculate MPG and fuel costs
Grade Calculator
Calculate required final exam grade
Water Intake Calculator
Calculate daily water needs
Reading Time Calculator
Estimate reading time for any text
Tip Splitter
Split the bill and tip between friends — instant, free tip splitter calculator.