Free Online Calculators
Fast calculators for discounts, percentages, tax, loans, mortgages, health, dates and daily planning. Enter values and get clear results instantly.
Discount Calculator
Calculate sale price, savings and discount percentage.
Use toolPercentage Calculator
Solve percentages, increases, decreases and ratios.
Use toolGST/VAT Calculator
Add or remove goods and services tax or VAT.
Use toolReverse Percentage Calculator
Find the original value before an increase, discount, or VAT.
Use toolDiscount Stacking Calculator
See what stacked percent, coupon and multi-buy discounts really cost.
Use toolBMI Calculator
Estimate body mass index with metric or imperial units.
Use toolAge Calculator
Calculate age in years, months, days and total days.
Use toolLoan Calculator
Estimate monthly loan payments and total interest.
Use toolMortgage Calculator
Calculate home loan payments and mortgage scenarios.
Use toolTip Calculator
Split bills and calculate tips quickly.
Use toolCalorie Calculator
Estimate daily calorie needs by activity level.
Use toolCompound Interest
Project savings growth with recurring contributions.
Use tool
Aspect Ratio Calculator
Resize images and videos while preserving ratio.
Use tool
Sleep Calculator
Plan sleep and wake times around sleep cycles.
Use toolCalculators for quick decisions
These free online calculators are built for everyday questions: price discounts, tax totals, loan payments, age, BMI and proportions. Each calculator focuses on fast input, clear output and related next steps.
Popular calculation categories
- Shopping and tax: discount calculator, percentage calculator and GST/VAT calculator.
- Finance: loan, mortgage and compound interest calculators.
- Personal planning: age, BMI, calories, tips and sleep calculators.