Free Calculators Tools
Nine calculators for everyday arithmetic: a percentage or a percentage change, a discount and what it actually saves, VAT added or taken out, a tip split between people, a loan payment with the total interest beside it, compound interest over time, BMI, unit conversions and four temperature scales at once. Each one shows its working, so you can check the answer instead of trusting it.
BMI Calculator
BMI in metric or imperial, with the weight range for your height.
Open tool CalculatorsCompound Interest Calculator
Project savings growth with contributions, compounding and inflation.
Open tool CalculatorsDiscount Calculator
Percent off, stacked discounts, and the real saving.
Open tool CalculatorsLoan Calculator
Monthly payment, total interest and a year-by-year amortization table.
Open tool CalculatorsPercentage Calculator
The four percentage questions, with the arithmetic shown.
Open tool CalculatorsTemperature Converter
Four temperature scales at once, plus the oven and gas mark chart.
Open tool CalculatorsTip Calculator
Tip, total and per-person share, with pre-tax tipping built in.
Open tool CalculatorsUnit Converter
Nine categories of units, with the same amount shown in all of them.
Open tool CalculatorsVAT Calculator
Add or remove VAT at any rate, with the rounding shown.
Open toolAll categories
Merge, split, rotate and reorder PDF pages without the file leaving your computer.
See these 6 toolsImages
Six tools for making an image lighter, smaller, a different format — or for reading what it hides.
See these 11 toolsText
Eleven tools for a block of text you need to change: case, order, duplicates, differences, counts.
See these 8 toolsDesign
Eight tools for the numbers behind a design: color formats, palettes, contrast, gradients, shadows, units.
See these 5 toolsSecurity
Five tools for passwords, hashes and 2FA codes, none of which send anything to a server.
See these 12 toolsDeveloper
Twelve tools for the formats that sit between systems: JSON, CSV, YAML, base64, JWT, UUIDs, timestamps.
See these 3 toolsEveryday
Three small tools that fit nowhere else: exact age, a fair random draw, Roman numerals.
See these 4 toolsTime
Four tools for counting time: days between dates, a week of shifts, a countdown, a focus timer.
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