Calculators

Free online calculators for all your needs.

New calculators

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Percentage Calculator

Grade Calculator

Weighted Average Calculator

Inflation Calculator

Mortgage Calculator

School & Grades

Calculadora Nota Final Calcule o que você precisa em seu exame para passar o curso.	GPA Calculator Calculate your GPA using your letter grades or percentages.
Grade Calculator Calculate what you need on your exam to to pass the course.	Weighted Average Calculator Calculate your weighted average course grade.

Money & Finance

Impermanent Loss Calculator Work out impermanent loss in a liquidity pool and compare it with simply holding the assets.	Inflation Calculator Calculate a country's inflation rate within two different years.
Mortgage Calculator Monthly payment, affordability and amortization schedule for the US, Canada and UK, with extra payments.	VAT Calculator Add or remove VAT, GST and sales tax for 60+ countries, with itemised invoices grouped by rate.
YouTube Money Calculator Estimate YouTube earnings from views, or the views needed for an income goal.

Algebra & Calculus

2D Graphing Calculator Plot functions, equations, inequalities and polar curves with sliders, zeros and intersections.	3D Graphing Calculator Plot surfaces, spheres, curves and parametric surfaces in 3D, then rotate, zoom and colour them by height.
Calculator Multiplication, division, squares, roots, powers, fractions, factors and more, with a keypad and step-by-step panels.	CAS Calculator Solve equations, systems and inequalities with steps, every real root of hard equations, simplify, factor, limits and series.
Derivative Calculator Derivatives with every step explained: product, quotient and chain rules, higher, partial and implicit derivatives.	Integral Calculator Antiderivatives and definite integrals with steps: substitution, by parts, partial fractions, numeric values.
Sum of Integers Calculator Add 1 to n, any range, squares, cubes, odd or even numbers, multiples, arithmetic and geometric series, or your own formula.

Everyday Math & Health

Baby Feeding Log One-tap breastfeeding timer, bottles, pumping and diapers, with today's totals.	Baby Growth Percentile Calculator Weight, length and head circumference percentiles on the WHO growth chart, with a private growth log.
BMI Calculator Calculate your BMI (Body Mass Index) using your height and weight.	BMR Calculator Basal metabolic rate and daily calories for your age, weight and height, plus calories to lose or gain.
Body Fat Calculator Estimate your body fat percentage with a tape measure (U.S. Navy method), then set a body-fat goal.	Body Surface Area Calculator BSA by ten formulas for adults and children, plus clinical helpers.
Calories Burned Calculator Calories burned by 80+ activities for your weight, with a weekly plan.	Conception Date Calculator Work out when you conceived from your due date, last period or IVF transfer.
Contraction Timer One big button to time labour contractions: length, gaps, hourly average and a 5-1-1 rule alert.	Days Between Dates Calculator Days, weeks, months, hours and business days between two dates, with end-date inclusion and holidays.
Heart Rate Zone Calculator Your max heart rate and five training zones, with the Karvonen method.	Ideal Weight Calculator Ideal body weight by four formulas, next to your healthy BMI range.
Macro Calculator Daily calories and grams of protein, carbs and fat for your goal, with preset or custom splits.	One-Rep Max Calculator Estimate your 1RM from a set, with a rep chart, plate loader and strength level.
Ovulation Calculator Find your fertile window, ovulation day and next period. Any cycle length, LH tests, private, adds to your calendar.	Percentage Calculator Calculate various percentages and convert ratios to percentages.
Period Calculator Predict your next period, log your cycles to get your own average, and see the year ahead.	Pregnancy Calorie Calculator Extra calories by trimester or breastfeeding, and healthy weight gain by week.
Pregnancy Due Date Calculator Due date from your last period, conception, IVF transfer or a scan, with weeks pregnant and key dates.	Pregnancy Test Calculator The best day to take a pregnancy test: implantation days, earliest sensitive test and when a test is dependable.
Protein Intake Calculator How much protein per day for your weight and goal, with a food builder.	Running Pace Calculator Pace, time and distance, splits, and race time predictions.
Sleep Calculator Best bedtime and wake-up time using 90-minute sleep cycles.	TDEE Calculator Your maintenance calories, plus calories to lose or gain weight.
Unit Conversion Calculator Convert feet to meters, mph to km/h, pounds to kilograms and many more units.	Waist-to-Hip Ratio Calculator Waist-to-hip, waist-to-height and body shape with risk levels.
Water Intake Calculator How much water to drink a day, with a daily tracker.	Weeks Pregnant Calculator How many weeks pregnant you are today, your trimester and a week-by-week table with baby size.

Physics & Science

Atomic Clock Simulator How far off is your clock? Work out drift per day or year from a frequency error, and see how atomic clocks compare.	Earth Curvature Calculator Enter a distance in kilometers or miles and see how much the Earth curves over it.
Faster-Than-Light Shadow Simulator Swing a torch beam or move a finger and watch the spot or shadow on the Moon outrun light, with true light-travel delay. See why no message rides on it.	Michelson-Morley Experiment Simulator Turn an interferometer through an aether wind, watch the fringes shift, compare the 1881 and 1887 experiments and calculate the expected shift.
Photoelectric Effect Simulator Shine light on a metal and watch electrons escape. Find the stopping voltage and photon energy, and measure Planck's constant.	Reynolds Number Calculator Laminar or turbulent? Work out Re for any fluid, speed and size, plus pipe friction, drag and vortex shedding.
Time Dilation Simulator How much would you age at close to the speed of light? Watch a traveller's clock, heartbeat and ageing slow down, see the light clock that explains why, fly the twin paradox at a steady 1 g, and calculate it.

Fun

Gematria Calculator Ordinal and Sumerian gematria values for any word or phrase, with a downloadable spreadsheet.

Pokemon Go Calculator Calculate how many pokemon you need to transfer before using your lucky egg.

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