Free business math calculator
Percentage Calculator Suite
Calculate percentages, VAT, discounts, markups, margins, percentage increase, reverse percentages, tips, bill splitting, percentage points and compound growth in one clean workspace.
What is X% of Y?
Find the value of a percentage.
Formula: percentage ÷ 100 × value
X is what % of Y?
Find the percentage ratio between two values.
Formula: part ÷ total × 100
Percentage Increase / Decrease
Compare old and new values.
Formula: (new − old) ÷ old × 100
Add or Subtract Percentage
Increase or reduce a number by a percentage.
VAT / Sales Tax Calculator
Add VAT or remove VAT from an inclusive amount.
Discount Calculator
Calculate sale price and savings.
Markup and Profit Margin
Important for pricing products and services.
Tip and Bill Split
Calculate tip, total bill and per-person share.
Reverse Percentage
Find the original value before increase or discount.
Percentage Points
Compare rates like VAT, interest, conversion rates or inflation.
Compound Percentage Growth
Calculate repeated yearly growth.
Continue with SHB ToolBox
Related Tools
More useful tools from Finance & Business. These links help you continue your workflow without searching again.
Complete percentage calculator for every common percentage question
This all-in-one percentage calculator is designed for the exact questions people search every day, such as “what is 10% of 500”, “8 is what percentage of 9”, “what is the percentage increase from 100 to 150”, “how to add 5% VAT”, “how to remove VAT from a total”, “how much is 35% off”, and “what is my profit margin”. Instead of opening many different tools, you can calculate all major percentage types on one page.
What is X% of Y?
Use this calculator when you want to find a percentage amount from a total. Example: 10% of 500 is 50. This is useful for discounts, commission, tax estimates, savings, exam marks, business targets and partial payments.
Formula: X ÷ 100 × Y
X is what percentage of Y?
Use this when you want to compare two numbers as a percentage. Example: 8 is what percentage of 9? The answer is 88.89%. This is useful for scores, ratios, completion rates, sales targets, attendance, conversion rates and performance comparisons.
Formula: X ÷ Y × 100
Percentage increase and decrease calculator
Calculate how much a value increased or decreased from an old value to a new value. Example: going from 100 to 150 is a 50% increase. This is useful for revenue growth, price changes, salary changes, stock movement, traffic growth and cost reduction.
Formula: (new − old) ÷ old × 100
Add or subtract a percentage
Quickly increase or reduce a number by a percentage. For example, add 15% to 1000 or subtract 20% from 750. This is useful for markups, service charges, discounts, inflation adjustment and estimating final prices.
Formula: value ± (value × percent ÷ 100)
VAT and sales tax calculator
Add VAT to a net amount or remove VAT from a VAT-inclusive gross amount. This is useful for UAE VAT, GCC tax calculations, invoices, quotations, product pricing and accounting checks.
VAT remove formula: gross ÷ (1 + VAT% ÷ 100)
Discount calculator
Calculate the sale price after a percentage discount and see exactly how much you save. Example: 35% off AED 750 shows both the discount amount and the final price. This is useful for shopping, ecommerce offers, retail promotions and seasonal sales.
Formula: original price − discount amount
Markup and profit margin calculator
Calculate profit, markup percentage and margin percentage from cost price and selling price. This is useful for online sellers, shops, wholesalers, service providers and small businesses that need accurate product pricing.
Markup = profit ÷ cost. Margin = profit ÷ selling price.
Tip and bill split calculator
Calculate tip amount, total bill and per-person share. This is useful at restaurants, cafes, group dinners, travel expenses and shared payments.
Total = bill + tip. Each pays = total ÷ people.
Reverse percentage calculator
Find the original amount before a percentage increase or percentage decrease. Example: if 120 is the value after a 20% increase, the original value was 100. This is useful for reverse discounts, tax-inclusive totals and original price calculations.
Original after increase = final ÷ (1 + percent ÷ 100)
Percentage points calculator
Compare two percentage rates correctly. For example, moving from 5% to 8% is a 3 percentage point increase, not simply a 3% increase. This is useful for interest rates, inflation, VAT rates, conversion rates and survey results.
Percentage points = new percentage − old percentage
Compound percentage growth calculator
Calculate repeated percentage growth over time. This is useful for investment growth, savings projections, business growth, yearly revenue growth and compound interest-style estimates.
Formula: start × (1 + rate ÷ 100)^years
Private browser-based calculation
Your numbers are calculated in your browser. SHB ToolBox does not need to store your prices, tax amounts, costs, sales data, margins, tips, salary figures or financial values.
Popular percentage examples
Common percentage formulas
- X% of Y: X ÷ 100 × Y
- X is what % of Y: X ÷ Y × 100
- Percentage change: (new − old) ÷ old × 100
- Add percentage: value + (value × percentage ÷ 100)
- Subtract percentage: value − (value × percentage ÷ 100)
- VAT amount: net × VAT rate ÷ 100
- Remove VAT: gross ÷ (1 + VAT rate ÷ 100)
- Discount amount: original price × discount percentage ÷ 100
- Markup: profit ÷ cost × 100
- Margin: profit ÷ selling price × 100
- Percentage points: new percentage − old percentage
- Compound growth: start × (1 + rate ÷ 100)^years
Percentage Calculator FAQ
How do I calculate 8 is what percentage of 9?
Use the “X is what % of Y?” calculator. Enter 8 as the part and 9 as the total. The answer is 88.89%.
How do I calculate what is 10% of 500?
Use the “What is X% of Y?” calculator. Enter 10 and 500. The result is 50.
How do I calculate percentage increase?
Enter the old value and new value in the percentage increase/decrease calculator. It uses (new − old) ÷ old × 100.
How do I calculate percentage decrease?
Enter the original value and reduced value. If a value falls from 200 to 150, the result is a 25% decrease.
How do I add 5% VAT?
Use the VAT calculator, choose add VAT, enter the net amount and set VAT rate to 5%.
How do I remove 5% VAT from a total?
Use the VAT calculator, choose remove VAT, enter the VAT-inclusive gross amount and set VAT rate to 5%.
How do I calculate a discount percentage?
Use the discount calculator. Enter the original price and discount percentage to see the saving and final sale price.
What is the difference between markup and margin?
Markup compares profit to cost. Margin compares profit to selling price. The same product can have different markup and margin percentages.
What is a reverse percentage calculation?
Reverse percentage finds the original value before a percentage increase or decrease. It is useful for original price and tax-inclusive calculations.
What are percentage points?
Percentage points measure the direct difference between two percentages. Moving from 5% to 8% is a 3 percentage point increase.
Can I calculate compound percentage growth?
Yes. Use the compound growth calculator to estimate repeated percentage growth over several years.
Does this percentage calculator store my numbers?
No. Calculations run in your browser and the tool does not need to store your financial or business values.