Online Calculators
Calculators for everyday money, health, date and file-size questions. Each one updates as you type and shows the formula it used, so you can check the working. Calculations run in your browser.
- 100% freeNo sign-up needed
- Private and secureRuns in your browser
- Instant resultsNothing to install
Money and shopping
Work out discounts, tax and percentages.
Discount Calculator
Find a sale price, the percent off, or the real total of stacked discounts.
GST Calculator
Add or remove GST at any rate and see the CGST, SGST or IGST split.
Percentage Calculator
Work out percent of, percent change and percentage difference with formulas.
Loans
Calculate repayments and interest.
Loan EMI Calculator
Calculate a loan's monthly EMI, total interest and amortization schedule.
Health
Health measures with the formula shown.
BMI Calculator
Calculate adult BMI in metric or imperial units and see the WHO category.
Dates and time
Work out ages, durations and hours.
Age Calculator
Find an exact age in years, months and days, and days to the next birthday.
Hours Calculator
Total hours worked with breaks and overnight shifts, in h:mm and decimal.
Chronological Age Calculator
Get chronological age on a test date as years;months;days for scoring.
Websites and file sizes
Calculations for websites, ads and files.
MB to KB Converter
Convert MB, KB and GB in both the 1,000 and 1,024 conventions.
AdSense Calculator
Estimate AdSense earnings from page views and your own RPM or CPC.
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Questions about calculators
Common questions from people using these tools.
Are the formulas shown?
Yes. Every calculator shows the formula and the numbers it used under the result.
Which calculator works out GST backwards from a total?
The GST calculator. Choose "Remove GST" to split a GST-inclusive price into the base amount and the tax.
How accurate is the EMI calculator?
It uses the standard reducing-balance formula that banks use for fixed-rate loans. Your lender's figure may differ slightly because of rounding, processing fees or a different day-count convention.