Percentage Calculator

Percentage calculations come up constantly in daily and professional life: calculating a restaurant tip, determining how much you save in a sale, checking an exam score as a grade percentage, computing profit margins, or measuring year-on-year growth. While any calculator can handle these with the right formula, most people cannot recall the correct formula quickly under pressure. This percentage calculator handles all four common percentage problem types clearly and guided: what is X% of Y, X is what percentage of Y, percentage increase from X to Y, and percentage decrease. Select your problem type, enter the values, and get the answer instantly. Consider a few situations where this tool proves immediately useful. A shopper sees a jacket marked down from $149.99 to $104.99 and wants to know whether that really is the advertised 30% off — entering the original and sale prices into the percentage change mode gives the precise figure in seconds. A small business owner reviewing monthly revenue figures needs to confirm whether sales grew 12% or 18% compared to the same month last year, and the percentage increase mode handles that comparison without any spreadsheet setup. A student who scored 67 out of 80 on a midterm can convert that raw score to a grade percentage instantly — a straightforward division problem that trips up many people under stress. Students, retail shoppers, freelancers tracking invoice growth, and finance professionals doing quick sanity checks on reports all benefit from having a guided, clearly labeled percentage tool on hand. It removes the friction of remembering whether to divide the difference by the original or the new value, and whether to multiply by 100 before or after. All calculations run entirely in your browser, so no data is ever sent to any server, making it safe to use with sensitive figures like salary comparisons or confidential business revenue numbers.