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.