TurboPercent Calculator

TurboPercent puts 100 fast, accurate calculators in one clean, ad-supported app — no sign-up, no locked tools, no subscription. Whatever you need to work out, there's a good chance it's already here: 📊 PERCENTAGES Increase, decrease, change, difference, percentage error, reverse percentage, percentage of a number, and more. 💰 FINANCIAL VAT, tip, discount, sales tax, mortgage repayments, loan repayment, compound interest, savings, loan affordability, extra mortgage payments, salary increases, break-even, ROI, pension, and more — built with real UK numbers in mind. 📐 GEOMETRY Area, volume and perimeter for circles, rectangles, triangles, spheres, cylinders, cones and more, plus a proper Pythagoras and right-triangle solver. 🔢 NUMBER THEORY Prime checking, factorisation, GCD/HCF, LCM, Fibonacci, modulo, and base conversion between binary, octal, hex and decimal. ➗ MATHS TOOLS Fractions, ratios, quadratic equations, simultaneous equations, standard deviation, probability, grade calculator, average, square root, speed/distance/time, and more. ❤️ HEALTH & EVERYDAY Age, BMI, body fat, calorie needs, ideal weight, pregnancy and ovulation dates, sleep calculator, water intake, and more. 🔁 UNIT CONVERTERS Length, weight, volume, area, speed, energy, data storage, cooking measurements and temperature — type into any field and watch every other unit update instantly. 📅 DATE & TIME Days until or since an event, date differences, working days between two dates, time zone conversion, and pregnancy week tracking. 🔨 HOME & DIY Paint, concrete, flooring, wallpaper, fencing and fuel cost calculators — know exactly how much material (or fuel) to budget for. 🧮 SCIENTIFIC CALCULATOR A genuine scientific calculator with trig functions, logarithms, powers, roots, factorials and constants — degree and radian modes included. WHY TURBOPERCENT ✔ Every calculator is genuinely free to use — nothing is locked behind a paywall ✔ Quick example values on every calculator, so you can see how it works before typing a single number ✔ Favourites and history, so your most-used calculators are always one tap away ✔ Light and dark mode ✔ Clean, fast, no clutter TurboPercent is supported by a small banner ad — that's it. No pop-ups, no interstitials interrupting your calculation, no forced video ads. Got a calculator you wish we had? We're actively adding more.