Percentage Increase Calculator
Calculate percentage increase or decrease between two values.
📐 % Change = ((New − Old) ÷ Old) × 100
Percentage increase and decrease calculations are essential for understanding salary growth, investment returns, inflation impact, product price changes, and population growth. A 10% annual salary increase doubles your salary in 7.3 years (Rule of 72). This calculator handles both single-period and compound percentage changes, so you can understand both the immediate change and the effect of repeated changes over time.
📋 How to Use This Calculator
Enter the original value and new value to calculate percentage change (positive for increase, negative for decrease). Or enter original value and percentage change to calculate the new value. For compound growth, enter the original value, annual growth rate, and number of years to see the final value using compound growth formula.
💡 Key Facts & Information
Rule of 72: years to double = 72 ÷ annual growth rate. At 8% annual growth, an investment doubles in 9 years. At 12%, in 6 years. Compound vs simple increase: 10% simple increase for 3 years on ₹1,00,000 = ₹1,30,000. 10% compound for 3 years = ₹1,33,100. The difference grows dramatically over longer periods — at 10% for 20 years: simple = ₹3,00,000; compound = ₹6,72,750. India CPI inflation averages 5–6% annually — meaning ₹1,00,000 today has purchasing power of ₹74,000 in 5 years at 6% inflation.