Free VAT calculator to add, remove or reverse VAT instantly. Supports global tax rates with accurate calculations for businesses and individuals.

Free fractions calculator to add, subtract, multiply, and divide fractions online. Full fraction solver with step-by-step working, simplification, mixed numbers, and a fractions chart.

Free grading calculator to find test scores, percentages & letter grades. Easy EZ grader for quizzes, exams & assignments with instant results.

Convert dBm to watts instantly with our free calculator. Includes formula derivation, step-by-step examples, conversion table, reverse W to dBm, signal reference chart, and FAQs.