Calculators
Calculators that stay on your device.
Percentages, loans, BMI, unit conversion, statistics, scientific math, and more — computed locally. No uploads for processing.
BMI calculator
Body mass index with healthy range.
Calculate BMI from metric or imperial inputs, see category, and a healthy weight range for your height.
Open calculator →CalculatorMortgage calculator
Payment with taxes and insurance.
Estimate monthly mortgage payment including principal & interest, property tax, and homeowners insurance.
Open calculator →CalculatorLoan & EMI calculator
Monthly payment, interest, payoff.
Personal loan, auto, or generic EMI: monthly payment, total interest, and total repaid.
Open calculator →CalculatorAmortization schedule
Month-by-month principal vs interest.
Full amortization table for a fixed-rate loan — payment split, remaining balance, cumulative interest.
Open calculator →CalculatorHome affordability
How much house can you afford?
Estimate max home price and loan from income, debts, down payment, rate, and a front-end DTI target.
Open calculator →CalculatorPercentage calculator
Percent of, change, reverse find.
What is X% of Y, percent change, what percent is X of Y, and reverse: find the whole from a part and percent.
Open calculator →CalculatorTip calculator
Tip, total, per person, round-up.
Restaurant tip calculator with custom percent, party split, and optional round-up to a whole total.
Open calculator →CalculatorDiscount calculator
Sale price and savings.
Original price and discount percent → final price and amount saved.
Open calculator →CalculatorVAT / tax calculator
Add or remove sales tax.
Add VAT to a net amount or extract tax from a gross total at any rate.
Open calculator →CalculatorCompound interest
Growth with contributions.
Future value with compound interest and optional regular contributions.
Open calculator →CalculatorSavings goal
Monthly deposit to hit a target.
How much to save each month to reach a goal amount in a set time, with optional interest.
Open calculator →CalculatorInflation calculator
Buying power over time.
See what today’s money is worth after N years of inflation, or the future cost of a current price.
Open calculator →CalculatorROI calculator
Return on investment %.
Gain, ROI percent, and simple annualized return from cost and payout.
Open calculator →CalculatorBreak-even calculator
Units to cover fixed costs.
Find how many units you need to sell to break even from fixed costs, price, and variable cost.
Open calculator →CalculatorSalary calculator
Annual ↔ hourly ↔ monthly.
Convert between annual salary, monthly, biweekly, weekly, and hourly pay.
Open calculator →CalculatorHours & overtime
Regular + OT paycheck.
Gross pay from hours worked, hourly rate, OT threshold, and OT multiplier.
Open calculator →CalculatorCalorie & TDEE
BMR, maintenance, goals.
Mifflin–St Jeor BMR and TDEE from activity, plus suggested calories to lose or gain ~0.5 kg/week.
Open calculator →CalculatorIdeal weight
Devine formula estimate.
Estimated ideal body weight from height and sex using the Devine formula (common clinical reference).
Open calculator →CalculatorBody fat (Navy)
US Navy tape method.
Estimate body fat percentage from circumference measurements using the US Navy method.
Open calculator →CalculatorPregnancy due date
EDD from LMP or conception.
Estimate due date and current pregnancy week from last menstrual period or conception date (Naegele-style).
Open calculator →CalculatorAge calculator
Years, months, days lived.
Exact age from birth date to today or a custom date — years, months, days, and total days.
Open calculator →CalculatorDate calculator
Add days or find difference.
Add or subtract days from a date, or count days between two dates.
Open calculator →CalculatorTime calculator
Add times or duration math.
Add or subtract hours and minutes, or convert a duration to total minutes/seconds.
Open calculator →CalculatorPace calculator
Run pace, finish time, speed.
Running/walking pace from distance and time, or finish time from pace — plus speed in km/h or mph.
Open calculator →CalculatorSleep calculator
Bedtime & wake from cycles.
Suggested bedtimes or wake times based on 90-minute sleep cycles plus fall-asleep buffer.
Open calculator →CalculatorGrade calculator
Final grade & weighted average.
What score you need on the final, plus weighted grade average from category scores.
Open calculator →CalculatorGPA calculator
Semester GPA from courses.
Calculate GPA from course grades and credit hours (4.0 scale).
Open calculator →CalculatorUnit converter
Length, mass, temp, more.
Convert common units across length, mass, temperature, and data size.
Open calculator →CalculatorCurrency calculator
Convert with your own rate.
Multiply an amount by an exchange rate you provide — no live feed, fully private.
Open calculator →CalculatorStatistics calculator
Mean, median, mode, σ.
Paste a list of numbers for count, sum, mean, median, mode, min/max, variance, and standard deviation.
Open calculator →CalculatorFraction calculator
Add, subtract, multiply, divide.
Fraction arithmetic with simplification and mixed-number display.
Open calculator →CalculatorRatio calculator
Simplify and scale ratios.
Simplify a ratio or scale it so one side matches a target value.
Open calculator →CalculatorArea calculator
Rectangle, circle, triangle.
Area for common shapes: rectangle, circle, triangle, and trapezoid.
Open calculator →CalculatorVolume calculator
Box, cylinder, sphere.
Volume for box, cylinder, sphere, and cone.
Open calculator →CalculatorFuel cost calculator
Trip cost from economy.
Estimate fuel cost from distance, efficiency (L/100km or MPG), and price per liter/gallon.
Open calculator →CalculatorScientific calculator
Trig, logs, powers, constants.
Expression calculator with parentheses, trig, logs, roots, and basic constants — keyboard friendly.
Open calculator →CalculatorNumber base converter
Bin, oct, dec, hex.
Convert integers between binary, octal, decimal, and hexadecimal.
Open calculator →CalculatorCalculator workspace
Scratchpad + quick percent.
A simple expression pad with running total helpers for quick everyday math.
Open calculator →