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Percentage Calculator

All common percentage calculations in one place

1️⃣ What is X% of Y?

% of = 30

2️⃣ X is what percent of Y?

is what % of = 15%

3️⃣ X is Y% of what?

is % of 200

4️⃣ Percentage increase / decrease

From to = +25%

5️⃣ Add or subtract a percentage

± % = 240 / 160

Common uses

  • Shopping discounts: 30% off a $50 item → Mode 1 (what is 30% of 50)
  • Tax calculations: Adding 8.5% sales tax to a price → Mode 5 (add percentage)
  • Tip estimation: 18% tip on $45 bill → Mode 1
  • Grade calculation: Got 85/120 on a test, what's the percentage? → Mode 2
  • Investment growth: Portfolio went from $10K to $11.5K, what's the gain? → Mode 4

Formulas

  • X% of Y = (X / 100) × Y
  • X as % of Y = (X / Y) × 100
  • X is Y% of N → N = X × 100 / Y
  • % change = ((new − old) / old) × 100

User Reviews

Average 4.8 stars based on 6 user reviews.

David Zhang2026-01-09
Role: Data Clerk

I needed percentage calculator that could enter values and get the calculation result, not just a generic page. Percentage Calculator keeps percent of value and percent change close to the real workflow, and it reduces manual conversion and repeated input.

Kevin Wang2026-04-14
Role: Everyday User

For people searching batch percentage calculator, this page matches the intent well. It is not a generic utility; Percentage Calculator is built around percent calculator; it is less error-prone than applying a formula manually, and the result is easy to keep working with.

Ryan Liu2026-01-19
Role: Office User

During math result verification, Percentage Calculator solves the part I worry about most: checking units and values across sources is slow. By keeping add/subtract percentage visible in the workflow, there is less manual cleanup, and it gives a result that is easy to review, so it belongs in my regular tool list.

Steven Sun2026-04-24
Role: Developer

I would recommend Percentage Calculator to anyone who needs percentage calculator. It covers long-tail needs like free online percentage calculator naturally, and features such as clear numeric input make the result easier to check than an ad hoc workaround.

Henry He2026-01-03
Role: Content Editor

The page focus is clear: the core is percentage calculator, percent calculator, and teaching or homework support. Percentage Calculator can finish unit conversion or math verification; inputs and results are direct enough for quick checks, which makes it easy to judge before using it.

Nathan Ma2026-04-08
Role: Operator

When I need percentage calculator for percent calculator, I care about fewer steps. Percentage Calculator keeps readable calculation results direct; with free online percentage calculator with multiple modes, follow-up review is easier for visitors coming from search.