Each is the main percentage calculator tuned for a specific real-world question, with relevant context and step-by-step explanations.
All four standard percentage modes on one page. The general-purpose tool.
Direct “what is P% of X” calculator with mental math shortcuts.
Sale price and savings. Plus how to stack multiple discounts.
Restaurant tipping with quick-pick percentages and bill splitting.
Points-to-percentage conversion plus US letter grade lookup.
Pricing math for retailers. Distinguishes markup (cost-based) from margin (price-based).
From old value to new value. Directional, with increase/decrease indicator.
Symmetric comparison when neither value is the baseline.