The maths and writing homework
toolbox.
Check sums step by step, tidy fractions and rounding, and polish the headline or readability of an essay.
Keep this toolbox for offline use
15 useful places to start.
Calculations show their conventions, such as angle units and rounding rules. Readability scores are estimates, not marks.
Scientific expression calculator
Evaluate several lines of arithmetic with functions, variables and the previous answer.
Significant figures calculator
Count significant figures, or round a number to a set number of significant figures or decimal places.
Decimal to fraction converter
Convert decimals, repeating decimals and fractions, or find the closest fraction with a small denominator.
Truth table generator
Build a truth table for a logical expression and see its minterms and normal forms.
Right triangle solver
Solve a right triangle from any two known sides, or a side and an acute angle.
Fraction calculator
Add, subtract, multiply or divide exact fractions.
Quadratic equation solver
Solve ax² + bx + c = 0, including complex roots.
Percentage calculator
Discounts, increases and everyday percentage puzzles.
Readability score calculator
Score text with Flesch reading ease, Flesch–Kincaid, Gunning fog, SMOG, Coleman–Liau and ARI.
Title case converter for AP, Chicago, APA and MLA
Convert headlines to AP, Chicago, APA or MLA title case, or to sentence case.
Word & character counter
A little clarity for essays, posts and everything you write.
Reading & speaking time
Estimate how long your text takes to read or say aloud.
Number to words
Write whole numbers in British English.
Fibonacci and Lucas number calculator
Compute exact Fibonacci or Lucas numbers, list the sequence, or test whether a number belongs to it.
Set operations calculator
Find the union, intersection, differences and Cartesian product of two sets, with Jaccard similarity.
A few things you
can tick off.
- Evaluate a chain of calculations
- Turn 0.1(6) into a fraction
- Check an essay’s reading level