Solve percentages, percent change, and increase/decrease scenarios with step-by-step formulas.
Run the calculator to see result, formula steps, and comparison projections.
Shopping discounts
Quickly check final price from a discount percent before checkout.
Performance tracking
Measure growth rates for revenue, traffic, conversion, or body metrics.
Markup and markdown
Apply increases/decreases cleanly for pricing, commissions, or budgeting.
This tool solves the most common percentage operations in one place: percentage of a value, what-percent checks, percentage change, and increase/decrease adjustments. Each run returns the formula, substituted values, and step-by-step math so users can validate calculations instead of trusting a black box.
Mode-Based Math
Switch between five percentage modes without changing pages or tools.
Formula Transparency
See equation, substitution, and intermediate steps for clear verification.
Scenario Projection
Compare common rates in a projection table to speed up practical decisions.
Precision Control
Adjust decimals for cleaner reporting in pricing, analytics, and planning.