Calculators
Everyday and scientific calculators: percentage, age, date, GPA, tip, area, and many more.
All Calculators (20)
Percentage CalculatorPopular
Solve every kind of percentage problem in one place.
Age CalculatorPopular
Calculate exact age in years, months, days and more.
Date Difference
Count days, weeks and months between two dates.
Add / Subtract Days
Add or subtract days, weeks or months from a date.
Scientific Calculator
A full scientific calculator with trig, logs and powers.
GPA Calculator
Calculate your weighted GPA on a 4.0 scale.
Grade Calculator
Find your final grade and what you need to pass.
Bill Split Calculator
Split any bill evenly across a group.
Area Calculator
Calculate area for rectangles, circles, triangles & more.
Volume Calculator
Compute volume of boxes, cylinders, spheres & cones.
Random Number Generator
Generate random numbers in any range, with no repeats.
Fraction Calculator
Add, subtract, multiply and divide fractions.
Average / Mean Calculator
Find mean, median, mode and range of a data set.
Ratio Calculator
Simplify ratios and solve for a missing value.
Pythagorean Calculator
Solve right triangles with the Pythagorean theorem.
Probability Calculator
Calculate single and combined event probability.
Countdown / Days Until
Count down the days until any future event.
Roman Numeral Converter
Convert numbers to Roman numerals and back.
Percentage Change
Calculate percentage increase or decrease.
Number to Words
Spell any number out in words (cheque writing).
Free Calculators that just work
Toolinza offers 20 free calculators that run entirely in your browser. There is no signup, no watermark and no limit — and because everything is processed locally, your data never leaves your device. Whether you are a professional, a student or just need something done quickly, these tools deliver accurate, standards-based results in seconds.