How to Calculate a Pay Raise and What It Is Worth After Inflation
A 3.5% raise on $52,000 is $1,820, but what does it buy? Learn the raise formulas, the effect of back-to-back raises, and how inflation changes the picture.
Free Online Calculators and Converters
Reeliy offers free online calculators, converters and randomizers for the numbers you meet every day: money, health, dates, building work, school math and more. Pick a category below or search for a specific tool.
Search 420 tools: percentage, BMI, miles to km…/Private by design: every tool runs in your browser, with no sign-up. The numbers you type are never uploaded.
Popular online calculators
- Percentage CalculatorPercentage calculator for percent change, percentage difference, X% of Y and what percent one number is of another, with the formula behind each mode.
- Compound Interest CalculatorCompound interest calculator for the final balance, interest earned and effective rate over any term, compounding frequency and regular deposits or withdrawals.
- Hours CalculatorFind how many hours and minutes lie between a start and end time, or between two dates, minus any break. Results come as hh:mm, decimal hours and minutes.
- Age CalculatorFind out how old you are from a date of birth or a birth year. Get your exact age in years, months, weeks and days, plus a running age and year-of-birth lookup.
- Date & Time Duration CalculatorFind the exact time between two dates and times, or between two clock times. See full years, months, weeks and days, then hours, minutes and seconds.
- Days CalculatorCount the days between two dates, with weekdays, weeks and months, or add days to a date to get the new date and weekday. Past and future dates both work.
- Years CalculatorYears calculator for whole calendar years: count the years between two years, see how long ago a year was, or find the year X years back or ahead.
- BMI CalculatorBMI calculator for adults: enter height and weight in US or metric units to get your body mass index, WHO category, BMI Prime and mortality hazard ratios.
- Water Intake CalculatorFind your daily water target and the part of it that should come from drinks, based on your age, size, activity level, pregnancy or breastfeeding status.
- Area CalculatorFind the area of a square, rectangle, triangle, circle, parallelogram, trapezoid, ellipse, sector or octagon, in mixed units, with every formula explained.
- Volume CalculatorCalculate the volume of a box, cube, cylinder, cone, sphere or triangular prism. Enter sizes in mixed units and read the result in the cubic unit you choose.
- Grade CalculatorTurn an exam score into a percentage and letter grade, find your weighted course grade with a final-exam goal, or see how one grade moves your average.
Popular online converters
- Metric ConverterConvert any length unit to any other: nanometers to kilometers, inches to leagues and everything between. Exact factors, worked examples and quick tables.
- Imperial to Metric ConverterConvert imperial lengths (inches, feet, yards, miles, leagues) to metric units from nanometers to kilometers, with exact factors, examples and tables.
- Metric to Imperial ConverterConvert metric lengths from nanometers to kilometers into inches, feet, yards, miles, nautical miles or leagues. Exact factors, worked examples and tables.
- Percent to Fraction ConverterConvert a percentage into a simplified fraction or mixed number. Learn the method, see worked examples, and check a chart of common percents.
- Fraction to Percent ConverterFraction to percent converter: enter a numerator and denominator and see the percentage as you type, with mixed numbers and a lookup table of common fractions.
- Km to Miles ConverterConvert kilometers to miles instantly (1 km = 0.621371 mi). Formula, race and speed-limit examples, a km to miles table and quick mental shortcuts.
- Inches to cm ConverterConvert inches to centimeters instantly. Type a length in inches and read the answer in cm, with the exact 2.54 factor, worked examples and a lookup table.
- Roman Numerals ConverterConvert numbers to Roman numerals and Roman numerals to numbers as you type. Includes the symbol values, the subtractive rules, worked examples and a chart.
Browse by category
Online calculators by category
- Business9 calculators
- Finance23 calculators
- Date & Time21 calculators
- Health18 calculators
- Fitness10 calculators
- Transportation7 calculators
- Construction12 calculators
- Math36 calculators
- Geometry26 calculators
- Trigonometry9 calculators
- Statistics29 calculators
- Physics18 calculators
- Data2 calculators
- Cryptography5 calculators
- Cooking7 calculators
- Other19 calculators
Online converters by category
- Dimensions28 converters
- Distance31 converters
- Area9 converters
- Volume1 converter
- Speed9 converters
- Date & Time9 converters
- Math13 converters
- Data Units19 converters
- Physics6 converters
- Cooking24 converters
- Other6 converters
Random generators
Featured articles
How to Calculate Time Slept and Sleep Efficiency
Time in bed and time asleep are not the same number. Learn to calculate both, handle the midnight crossing, and compute sleep efficiency by hand.
Compare Unit Prices: Which Size or Brand Is Really Cheaper?
The bigger pack is not always the better value. Divide price by quantity, use the same unit for both, and the cheaper choice becomes obvious.
- No sign-up
Open a tool and use it. No account, no email, no paywall.
- Runs in your browser
The math happens on your device and the numbers you type are never uploaded. Results are kept in the page address, so share a link only if you are happy to share the values.
- Formulas shown
Most tools explain the formula behind their result and show a worked example, and each tool states its assumptions and limits, so you can check an answer rather than just trust it.