Utility Calculators

Not every calculation is a major financial decision — sometimes you just need to know what 18% tip on $47 is, or how many square feet are in 12 square meters, or what a product's original price was before a 30% discount. This category collects all the "quick math" tools in one place so you can get an answer in under 10 seconds.

The percentage calculator goes well beyond simple percentage-of-a-number: it handles percentage change, reverse percentages, percentage error, and fraction conversions — 10 modes total with step-by-step solutions so you can see exactly how the result was reached. For shoppers, the discount calculator handles stacked discounts, BOGO deals, and sale price vs. original price lookups across 8 modes.

For freelancers and small business owners in the UK or anyone dealing with European-style VAT, the VAT calculator lets you add or remove tax at any rate, with a country picker covering 80+ jurisdictions. The unit converter bridges the imperial-metric gap that still trips up US travelers and anyone working with international specs — covering length, weight, temperature, area, and volume.

Tipping culture is strong in the US, and the tip calculator splits bills instantly between any number of people. Need to track billable hours? The time calculator adds, subtracts, multiplies, and converts durations across 7 modes — including a work-time breakdown and a multi-entry sum mode.