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Free Online Calculators & Converters

Free tools for finance, health, maths, dates, and words. No sign-up required.

Built and maintained by , founder and creator of yootils.

Browse by Category
Finance
Mortgages, loans, investments & income
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Health & Fitness
BMI, body composition, nutrition & fitness
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Date & Time
Dates, times, time zones & calendars
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Maths & Conversion
Percentages, units, fractions & bases
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Words & Text
Anagrams, descrambling, Wordle & case
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Finance
Mortgage Calculator
Monthly payments & amortisation
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Mortgage Payoff
Extra payments & payoff date
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LTV Calculator
Loan to value & next band
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Amortization Schedule
Full payment-by-payment breakdown
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Compound Interest
Growth over time with contributions
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Interest Rate
Find the rate from loan payments
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Loan Payment Table
Compare rates & terms side by side
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Take-Home Pay
Net pay after tax & deductions
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Pay Rise Calculator
What a rise is worth after tax
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Finance Calculator
PV, FV, rate, periods
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Interest Calculator
Simple & compound interest
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Credit Card Payoff Calculator
Time, interest & the minimum trap
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Investment Calculator
End balance with contributions & compounding
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Savings Calculator
Project growth & time to reach a goal
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How Long Will My Money Last
Savings drawdown & safe withdrawal amount
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ROI Calculator
Return on investment & annualised ROI
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Average Return
Geometric & arithmetic mean returns
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US Auto Loan Calculator
Monthly payment & amortisation schedule
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Date & Time
Calendar
Browse any month
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Date Calculator
Days between two dates
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Day Counter
Count days to/from a date
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Business Days Calculator
UK working days & bank holidays
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Day of the Week
What day is any date?
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Time Calculator
Add and subtract time
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Time Duration
Duration between two times
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Time Zone Converter
Convert times across time zones
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Sunrise & Sunset
Sun times for any location & date
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Week Number
ISO week numbers & full year calendar
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World Clock
Live times for cities worldwide
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Time Zone Map
All UTC offsets with current local times
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Daylight Saving Time
DST status for countries worldwide
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Age Calculator
Exact age in years, months, and days
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Pregnancy Countdown
Week-by-week pregnancy tracker
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Age Difference
Exact age gap in years, months & days
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Health & Fitness
BMI Calculator
Body mass index with weight category
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Body Fat Calculator
Estimate body fat % from measurements
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BMR Calculator
Basal metabolic rate & daily calorie needs
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Macro Calculator
Daily calories & protein, carb, fat targets
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Lean Body Mass
LBM via Boer, James & Hume formulas
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Healthy Weight
Healthy weight range for your height
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Ideal Weight Calculator
Healthy weight range from multiple formulas
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Protein Calculator
Daily protein target by goal & activity
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Pace Calculator
Running pace, finish time & pace converter
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Height Calculator
Convert cm ↔ feet & inches
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Weight Calculator
Convert kg, lbs, and stone
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Sleep Calculator
Bedtime & wake times by sleep cycle
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Steps Calculator
Steps to miles/km by height & pace
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WHR Calculator
Waist-to-hip ratio & health risk level
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Maths & Conversion
Percent Calculator
Percentages, changes, and ratios
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Probability Calculator
Single events, two events & repeated trials
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Unit Converter
Length, mass, temperature & more
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Base Converter
Decimal, binary, hex, octal
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Hex ↔ RGB
Colour code converter
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Decimal to Fraction
Convert any decimal to a simplified fraction
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Fractions Calculator
Add, subtract, multiply & divide fractions
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Ratio Calculator
Simplify, solve, scale & divide
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Words & Games
Anagram Solver
Find all anagrams of a word
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Word Unscrambler
Unscramble any set of letters
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Wordle Solver
Get hints for today's Wordle
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Case Converter
UPPER, lower, Title, camelCase & more
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