Finance & Budget
Everyday calculations: tools, guides and answers
Simplify the calculations that come up all the time. Tools, guides and answers help you check results without opening a spreadsheet.
Explore by need
Tools & Calculators
Use the tools linked to this subcategory right away.
Percentage calculator
Compute a discount, VAT, margin, share or evolution in real time. Fill in any two boxes, the third adjusts automatically. Bi-directional, with full formula and multiplier coefficient so you actually understand the math.
Open the tool
Rule of three (cross multiplication)
Good old cross multiplication, made fast. Enter 3 known values, the tool computes the 4th instantly. Handles units, decimal commas and large numbers. No sign-up.
All tools
2 tools