Calculator: All-in-One Tools

Calculator.free is an all in one calculator app: a scientific calculator, a unit converter and 200 calculators for money, health, math, dates and everyday life. Every calculation runs on your phone, so it works offline and nothing you type leaves the device. POPULAR CALCULATORS Percentage, BMI, loan, mortgage, EMI, compound interest, tip, discount, age, date difference, GPA, grade, calorie, pregnancy due date, fraction, square root and sales tax or VAT. FINANCE AND LOAN CALCULATORS (41) Mortgage, loan, auto loan, personal loan, student loan, EMI, SIP, compound and simple interest, savings goal, retirement, 401(k), Roth IRA, credit card payoff, debt payoff, refinance, rent vs buy, home affordability, ROI, profit margin, inflation and more. TAX AND SALARY Income tax with brackets for 6 countries, sales tax, VAT or GST for 8, and salary to hourly pay. HEALTH AND FITNESS (28) BMI, calorie and TDEE, BMR, body fat, ideal weight, macros, protein intake, calorie deficit, water intake, heart rate zones, running pace, one rep max, pregnancy due date, ovulation, period and sleep cycle. MATH (27) Percentage, percentage change, fractions, ratio, average, exponents, square and nth roots, logarithms, GCD and LCM, prime factorization, permutations and combinations, quadratic formula, Pythagorean theorem, slope, area, volume and rounding. STATISTICS (15) Mean, median and mode, standard deviation, variance, z-score, p-value, confidence interval, margin of error, sample size, probability and normal distribution. SCIENCE AND ENGINEERING (27) Ohm's law, voltage drop, resistor color code, electrical power, electricity cost, force, kinetic energy, density, molarity, ideal gas law, pH, projectile motion, torque, subnet and binary, hex and decimal. UNIT CONVERTER (17) Length, weight, temperature, speed, area, volume, time, data storage, energy, pressure, power, angle, fuel economy, number base, Roman numerals and cooking measurements. DATE AND TIME (15) Age, date difference, add or subtract days, business days, countdown, days until a date, week number, hours, time card, day of the week and Unix timestamps. EVERYDAY (27) Tip, discount, unit price, GPA, final grade, test score, commission, recipe scaler, paint, tile, concrete, square footage, tire size, random number, dice and coin flip. SCIENTIFIC CALCULATOR • Basic mode works like a pocket calculator: it evaluates left to right, and the percent key takes a percentage of the running total, so 200 + 10 % gives 220. • Scientific mode adds sin, cos, tan and their inverses in degrees or radians, log, ln, roots, powers, factorial, pi, e and Ans. • A tape keeps your recent results. Tap one to reuse it. MADE FOR YOUR PHONE • Search every calculator by name or topic, star favorites and find recent ones on the home screen. • Save a calculation to History and reopen it later with the same inputs. • Charts and full schedules, such as a year by year amortization table. • Share a result as text, or long press any result to copy it. • Each calculator explains how it works, with questions and answers. • Pick your country once for the right currency and default rates. • A home screen widget and a Quick Settings tile open the keypad in one tap. PRIVATE BY DESIGN The app has no internet permission and no account. Favorites, history and settings are stored only on your phone. The formulas match calculator.free, and the app is tested against the website's own results. Questions or ideas? Use Send feedback in Settings.