Inflation Calculator
What something that costs a given amount today will cost after years of inflation, and how much buying power money loses
Interactive Sandbox
Adjust values in real-time and observe mathematical cause-and-effect
Exponential Compounding Growth: Returns generate subsequent returns over time t, rapidly accelerating capital growth.
Variable Mechanics
Roles, constraints & impacts
Cost Today
Formula Parameter
Annual Inflation Rate
Formula Parameter
Years
Formula Parameter
At a Glance
Gotchas, units & real-world use
Formula Nature & Mechanics
Exponential Compounding Growth: Returns generate subsequent returns over time t, rapidly accelerating capital growth.
Common Mistakes & Traps
- Entering annual percentage rate (e.g. 7%) as 7 instead of converting to decimal 0.07.
- Neglecting the compounding frequency (n): monthly compounding produces higher yield than annual.
- Ignoring inflation drag when evaluating long-term nominal returns.
Dimensional Analysis & Units
Currency × (1 + rate)^time = Future Currency ($)
Real-World & Industry Application
Retirement 401(k) / Roth IRA compounding, mortgage amortization schedules, bond yield analysis, and inflation depreciation modeling.
Worked Example: Inflation
Given:
- amount = 1000
- rate = 6
- years = 10
- Growth factor = (1 + 6%)^10 = 1.7908
- Future cost = $1,000 × 1.7908 = $1,790.85
- $1,000 kept as cash will buy only $558.39 of today's goods after 10 years
- Buying power lost = 44.2%
Answer: 1790.85
Frequently Asked Questions
What is the Inflation formula?
Future cost = Today's cost × (1 + inflation)ᵗ. What something that costs a given amount today will cost after years of inflation, and how much buying power money loses.
How do I calculate Inflation?
Enter Cost Today (amount), Annual Inflation Rate (rate), Years (years) into the calculator. It applies Future cost = Today's cost × (1 + inflation)ᵗ and shows every step of the working.
