PERCENTAGE CALCULATOR

Use our free percentage calculator to work out percentage increase/decrease, percentage difference, discounts & reverse percentages — plus pay rise, bonus, tax percentage and superannuation % in one place. Built for everyday Australian scenarios: salary changes, shopping discounts, and quick money math.

Basic % + Pay, Bonus & Tax % + Discounts & Reverse % Percentage Calculator. Press Enter to calculate.

1 What is X% of Y?

Result = X% × Y
Answer

2 X is what percent of Y?

Result = (X ÷ Y) × 100
Answer

3 Percentage increase / decrease (A → B)

((B − A) ÷ A) × 100
Change

4 Pay Rise / Pay Cut

Δ = B − A • % = (Δ ÷ A) × 100
Change %
Difference

5 Tax as % of income

(Tax ÷ Income) × 100
Tax %

6 Bonus as % of salary

(Bonus ÷ Salary) × 100
Bonus %

7 Superannuation calculator

Super = Rate% × Base
Super amount

8 Percentage off / Discount

Final = Original × (1 − d)
Final price
You save

9 Add / subtract percentage (markup / reduction)

Add: ×(1+r) • Sub: ×(1−r)
After adding %
After subtracting %

10 Reverse percentage (find original from final)

Original amount
Change amount

Tip: Choose a tab to match your goal — Basic %, Pay, Bonus & Tax %, or Discounts & Reverse %.

Basic (%) Percentage Calculator (Increase, Decrease & Diff)

Perfect for comparing two values, finding percentage change, and calculating percentage difference.

  • Percentage increase calculator (e.g., 60 → 72)
  • Percentage decrease calculator (e.g., 200 → 170)
  • Percentage difference calculator (compare two numbers)
  • Percentage change calculator over time

Pay, Bonus & Tax (%) Percentage Calculator

Made for Australian pay conversations — calculate pay rises/cuts, bonus %, tax %, and super % instantly.

  • Pay rise / pay cut percentage from old vs new pay
  • Bonus percentage of salary or wage
  • Tax percentage calculator (tax as % of income)
  • Superannuation percentage (super as % of pay)

Discounts & Reverse % (Off, Add & Original Price)

Work out percentage off, reverse discount, and “what was the original price?” in seconds.

  • Percentage discount calculator (sale price + savings)
  • Percentage off calculator (X% off $Y)
  • Reverse percentage calculator (find original value)
  • Add percentage calculator (increase price by X%)

Ready to Calculate — Pick See What You Really earn. Pay, Bonus & Tax or Contractor Pay?

Pay Calculator Tax Calculator Contractor Pay Calculator GST Calculator

FAQs

How do I calculate a percentage increase or decrease?

Percentage change is calculated by dividing the difference between the new and original value by the original value, then multiplying by 100. Our calculator does this instantly for increases and decreases.

What’s the difference between percentage change and percentage difference?

Percentage change uses an original starting point (old → new). Percentage difference compares two values without treating either as the “original”. Use difference when you’re comparing two numbers fairly.

Can I calculate a pay rise or salary increase percentage in Australia?

Yes — use the Pay, Bonus & Tax % tab to calculate pay rise/pay cut %, bonus %, tax as a percentage of income, and superannuation %.

How do I calculate a discount or percentage off?

Enter the original price and the discount percentage to get the discounted price and savings. For reverse discounts (finding the original price), use the Reverse % option in the Discounts tab.

Is this percentage calculator free?

Yes — it’s free to use with no sign-up. Built by Australia Pay Calculator to help Australians with quick, accurate percentage calculations.

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