Search Tools

Instantly calculate the monthly installment, total interest and repayment plan.

Plan your monthly income and expenses by category.

Track your subscriptions and renewal dates; see your total monthly and yearly spend.

Calculate the tip on your bill, choose a currency, and split the total equally or by custom shares.

Calculate simple interest and compound interest on one page; see total interest and the final amount based on principal, rate, and term.

Calculate the discounted price (including stacked/cascading discounts) or work out the selling price and profit from a target profit margin.

Calculate when you'll reach your savings goal, or how much you need to save monthly to hit it by a target date.

Instantly plot and examine the graph of mathematical functions.

Quickly calculate square roots, cube roots and exponents.

Explore the digits of pi and do circle-related calculations.

A full-featured calculator with algebra, trigonometry and calculus keys.

Calculate probability scenarios with combinations and permutations.

Calculate percentages, increases, decreases, percentage difference, and original values.

Calculate arithmetic, geometric, and harmonic means along with sum, minimum, and maximum values.

Calculate weighted averages using grades, credits, and coefficients or find the value needed for a target average.

Calculate mean, median, mode, standard deviation, variance, range, quartiles, and IQR.

Solve direct and inverse proportions, calculate scale, and simplify ratios.

Add, subtract, multiply, divide, and simplify fractions or convert them to decimal, percent, and mixed numbers.

Add, subtract, and multiply matrices or calculate determinant, inverse, transpose, rank, and trace.

Add and subtract vectors or calculate dot product, cross product, magnitude, unit vector, angle, and projection.

Calculate permutations, combinations, selections with repetition, factorials, and binomial coefficients exactly.

Test primality, find prime factors, list primes in a range, and calculate neighboring prime numbers.

Calculate the GCD and LCM of 2–10 numbers with Euclidean steps and prime factorizations.

Convert binary, octal, decimal, hexadecimal, and custom bases from 2 through 36 exactly.

Generate random integers, decimals, odd, even, or unique number lists.

Calculate natural logarithms, log10, custom-base logarithms, antilogs, and change-of-base results.

Convert numbers to scientific, standard, or engineering notation and choose significant figures.

Evaluate, add, subtract, multiply, differentiate, solve, and factor polynomials.

Calculate complex arithmetic, conjugate, modulus, argument, and polar conversions.

Choose the number and type of dice, roll animated dice, and see the results instantly.

Add your choices, spin the animated wheel, and instantly make a fair random selection.

Toss a 3D animated coin and instantly get a fair Heads or Tails result.

Everyone places a finger on the screen and the tool randomly selects one from 2–10 touches with animation.

Randomly and fairly select one or more people from a list of names.

Split a list of names into random, balanced, non-repeating teams in seconds.

Place names around a circle, spin an animated bottle, and instantly see who it selects.

Match participants fairly and privately, letting each person reveal only their own gift recipient.

Solve first- and second-degree equations step by step.

See your exact age and important day counts based on your birth date.

Calculate the day, week and month difference between two dates.

Live-track the time remaining until an important date.

Calculate your body mass index based on height and weight.

Find your daily water needs based on weight and activity level.

Calculate BMR, TDEE, goal calories, and daily protein, carbohydrate, and fat distribution.

Compare ideal weight estimates from multiple formulas and a healthy weight range based on height and sex.

Estimate body fat percentage from height, neck, waist, and, when needed, hip measurements.

Calculate waist circumference relative to height for a general assessment of central adiposity.

Estimate your one-repetition maximum and training percentages from weight lifted and repetitions completed.

Calculate pace per kilometer, average speed, and race finish estimates from distance and duration.

Calculate five personal training heart-rate zones from your age and optional resting heart rate.

Calculate bedtime or wake-up options aligned with approximate sleep cycles.

Calculate pregnancy week, trimester, and estimated due date from the last menstrual period.

Instantly see the character, word, sentence and paragraph count of the text you type or paste.

Generate strong, random passwords and choose which character types to include.

Instantly turn the text or link you type into a scannable QR code.

Instantly convert your text to UPPERCASE, lowercase, Title Case and more.

Instantly generate placeholder text for design and content mockups.

Format JSON data into readable pretty-print, or minify it into a single compact line.

Check whether your JSON data is valid; if not, see exactly which line and column the error is on.

Encode text into Base64 format or decode Base64 data back into the original text.

Generate unique UUID identifiers in v1, v4, or v7 format; create multiple at once.

Decode a JWT (JSON Web Token) and verify its signature, or generate a new one from a header/payload (HS256/HS384/HS512).

Work for 25 minutes, take a 5-minute break; take a long break every 4 sessions with the Pomodoro Technique.

52 minutes of complete focus, 17 minutes of complete rest — the balanced work rhythm used by the most productive workers.

90 minutes of deep focus, 20 minutes of complete rest — a work rhythm that follows the brain's natural peak-focus cycle.

Sort your tasks by urgency and importance into four quadrants; get clear on what to do now, schedule, delegate, or drop.