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Calculators for age, BMI, loans, dates, statistics and more.
42 tools
Calculate dimensions from aspect ratios — 16:9, 4:3, 1:1, and more.
Calculate exact age in years, months, days from date of birth.
Calculate monthly loan EMI, total interest, and amortization schedule.
Calculate BMI in metric or imperial with instant health category.
Calculate time differences, durations, conversions, and world clocks.
Compute mean, median, mode, std dev, quartiles and more from a list of numbers.
Find the exact difference between two dates.
Find what day of the week any date falls on.
Live countdown timer to any future date or event.
Calculate GCD and LCM of multiple numbers.
Check if a number is prime and find its factors.
Generate Fibonacci sequences and check Fibonacci numbers.
Compute tips and split bills with a slider — no math required.
5-in-1 percentage calculator: X% of Y, increase/decrease, discount.
Compute future value with compounding and monthly contributions.
Estimate due date from LMP, conception, or ultrasound.
Pace ↔ distance ↔ time for runners and cyclists.
TDEE + macros (protein/carbs/fat) for your goals.
Monthly mortgage payment with tax, insurance, and HOA.
Solve ax² + bx + c = 0 with discriminant, roots, vertex.
Full scientific calculator with trig, log, factorial, history & keyboard input.
Secure random integers or decimals in any range — unique, sorted, with stats.
Semester & cumulative GPA on 4.0/4.3/5.0 scales, with target-GPA planner.
Add, subtract, multiply & divide fractions with step-by-step working.
Find the best bedtime or wake-up time using 90-minute sleep cycles.
Weekly timesheet: clock in/out, breaks, overtime, and gross pay.
Predict ovulation, fertile window, and next period with a 6-month forecast.
nCr/nPr, coin flip odds, dice sum distribution, and card draw probability.
Compare price per unit across product sizes to find the best deal.
Estimate trip fuel cost from distance, efficiency and fuel price.
Convert between hourly, daily, weekly, monthly and annual pay.
Find sale price, savings, stacked discounts and reverse discount %.
Calculate the exam score you need to reach your target grade.
Find the moon phase, illumination and age for any date.
Convert dollar values between years with US CPI data or a custom inflation rate.
Add or remove VAT, GST or sales tax with country presets and instant results.
Enter any two of cost, price, markup % or margin % — the rest compute live.
Simplify ratios, solve proportions and scale ratios to any total — with visuals.
Find your BMR and daily calorie needs with three formulas and goal targets.
Count working days between dates or add business days, with custom weekends and holidays.
Sunrise, sunset, twilight, golden hour and day length for any place and date.
Decode resistor color bands to ohms — or find the bands for any resistance value.