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Precision Instruments · Calculators 04 & 05

Savings & Inflation
Calculator.

Use our free savings calculator to project future wealth with compound interest — and see the real value after inflation. Switch to the inflation calculator to measure exactly how rising prices erode purchasing power over any time period.

Modern architectural marble columns with minimalist shadows — savings and wealth
Currency
Mode: Savings Goal

Savings Parameters

$
$
7.0%
0%10%20%
3.2%
0%5%10%
30 yrs
125 yrs50 yrs

The Silent Tax

Inflation is the invisible denominator in every financial equation. While your portfolio's nominal value may grow, its utility — what that money can actually acquire — is under constant pressure. At 3% inflation, $1,000,000 today is reduced to roughly $744,000 in purchasing power within a decade. Effective wealth management must prioritize real returns over nominal gains.

Inflation Parameters

$
3.1%
0%7.5%15%

US avg: 3.1% | UK avg: 2.8% | Global avg: ~3.5%

Why Inflation Matters

Between 2000 and 2025, cumulative US inflation was approximately 96% — meaning prices nearly doubled. What cost $100 in 2000 costs about $196 in 2025. Understanding inflation is the first step to protecting your wealth against it.

30-Year Trajectory

Nominal Growth vs Purchasing Power

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Future Nominal Value
—
Total accumulated capital
Real Purchasing Power
—
Adjusted for 3.2% inflation

Growth Trajectory

Nominal
Inflation Adjusted
Total Contributed

Total Contributed

—

Interest Earned

—

Purchasing Power Lost

—

Real Gain

—

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Power Loss
— estimated
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Hedge Status
Calculating…

Inflation Impact

Purchasing Power Erosion Analysis

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Today's Equivalent Value

$ —

What your money is worth in today's purchasing power

Original Amount

—

Purchasing Power Lost

—

Cumulative Inflation

—

Years Calculated

—

Purchasing Power Remaining

100%
0% remaining 100% remaining

Equivalent Value Per Decade

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Year by Year

Projection
Timeline.

See exactly how your money grows each year — both in nominal terms and adjusted for inflation.

10-Year Value

—

20-Year Value

—

Final Value

—

Year Contributed Nominal Value Real Value
Calculate above to see your projection timeline.
Savings Guide

Free Savings Calculator — Where to Put Your Money.

The right savings vehicle depends on your time horizon, risk tolerance and tax situation. Here's a breakdown of the most important options — from risk-free high-yield savings to long-term equity investing.

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High-Yield Savings Account

Online banks offer 4–5% APY savings accounts — 10–50× more than traditional banks. FDIC insured up to $250,000. Best for emergency funds and short-term savings goals.

Current Avg Rate4–5% APY
Risk LevelVery Low
Best ForEmergency fund
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Index Funds (S&P 500)

The S&P 500 has averaged ~10% annually for 100+ years. Low-cost index funds from Vanguard, Fidelity or Schwab give you broad market exposure with minimal fees (as low as 0.03% expense ratio).

Historical Avg~10% annually
Risk LevelMedium–High
Best ForLong-term wealth
elderly

401(k) / IRA

Tax-advantaged retirement accounts. 401(k): contribute pre-tax, grow tax-deferred. Roth IRA: contribute after-tax, withdraw tax-free. Always max employer match first — it's an instant 50–100% return.

401(k) 2025 Limit$23,500/yr
IRA 2025 Limit$7,000/yr
Best ForRetirement
savings

CDs (Certificates of Deposit)

Fixed-rate savings for a set term — typically 3 months to 5 years. Higher rates than regular savings but money is locked in. FDIC insured, no market risk whatsoever.

Current Avg Rate4–5.5% APY
Risk LevelNone
Best ForSpecific goals
real_estate_agent

Real Estate / REITs

Direct property or Real Estate Investment Trusts. Historically strong inflation hedge as property values tend to rise with prices. REITs are liquid and pay dividends — no landlord duties.

Historical Avg8–12% annually
Risk LevelMedium
Best ForInflation hedge

The Rule of 72

Divide 72 by your annual return rate to find how many years it takes to double your money. A quick mental shortcut every investor should know.

At 4% return: doubles in 18 years
At 7% return: doubles in ~10 years
At 10% return: doubles in 7.2 years
At 12% return: doubles in 6 years
Inflation Calculator Guide

How Inflation Works and Why It Matters.

Our free inflation calculator shows you how much purchasing power a sum of money loses over any time period. Enter a starting amount, a start year, an end year and an average inflation rate — the calculator shows what that money is worth today in real terms.

CPI — Consumer Price Index

Most Common

Measures price changes for a basket of consumer goods. What the US Bureau of Labor Statistics uses to track official inflation. The Federal Reserve targets 2% annually as a stable baseline.

What Causes Inflation?

Demand-pull (too much money chasing too few goods), cost-push (rising production costs), and built-in inflation (wage-price spiral). The post-2020 surge was caused by pandemic supply chain disruptions combined with unprecedented monetary expansion.

US Historical Inflation Rates

1990s avg

3.0%

2000s avg

2.6%

2020–2024

5.8%

Protecting Your Wealth

How to Beat Inflation.

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Invest in equities

The S&P 500 has historically returned ~10% annually — well above average inflation. Use our savings calculator to model the difference staying invested makes vs holding cash.

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Real assets

Property, commodities and REITs tend to rise with inflation because their underlying value is tied to physical goods, not paper money. A mortgage on an appreciating home is itself an inflation hedge.

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TIPS (Treasury Inflation-Protected Securities)

US government bonds where the principal adjusts with CPI. Guaranteed to keep pace with official inflation. Low yield but zero inflation risk — ideal for capital preservation.

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High-yield savings for cash

At 4–5% APY, high-yield savings accounts partially offset inflation for your liquid emergency fund. Don't leave your cash sitting in a 0.01% traditional savings account losing value in real terms every month.

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Lock in fixed-rate debt

Inflation erodes the real value of debt. If you have a fixed-rate mortgage at 3–4%, inflation effectively reduces its real cost over time — making the debt cheaper in real terms year after year. See our mortgage calculator to model this.

Knowledge Base

Frequently Asked Questions.

Everything you need to know about savings growth, compound interest, inflation and wealth preservation.

Compound interest is earning interest on your interest — not just your original principal. A $10,000 investment at 7% earns $700 in year one. In year two it earns 7% on $10,700 = $749. Over 30 years this compounds to over $76,000. Starting 10 years earlier can more than double your final balance. Use our savings calculator above to see this effect in real numbers.

The standard recommendation is the 50/30/20 rule: 50% of take-home pay on needs, 30% on wants, 20% on savings and investments. At minimum, save enough to get your full employer 401(k) match, then build a 3–6 month emergency fund. For retirement, saving 15% of gross income starting in your 20s is a widely cited target to retire comfortably at 65.

It depends on where you're investing. High-yield savings: 4–5%. Bond portfolio: 3–5%. Balanced 60/40 portfolio: 5–7%. S&P 500 index fund: 7–10% (historical average). For conservative long-term planning use 6–7%. Always model with inflation (3–3.5%) enabled to see your real purchasing power, not just nominal numbers — our calculator does this automatically.

Purchasing power is the quantity of goods or services a unit of currency can buy. Inflation reduces it over time. At 3% annual inflation, $100 today only buys what $97 buys next year. Over 25 years, $1,000,000 in savings has the purchasing power of about $477,000 in today's terms. This is why investing to beat inflation matters more than looking at nominal account balances.

The common benchmark is the 4% rule: you can withdraw 4% of your portfolio annually without running out of money over 30 years. To retire on $60,000/year you need $1.5M. $80,000/year requires $2M. $100,000/year requires $2.5M. Use our savings calculator above — set your monthly contribution and return rate to see when you'll hit your number.

Cash in a regular bank account (0.01–0.5% APY) is effectively losing value every year to inflation. However, cash has its place: emergency funds (3–6 months of expenses), short-term goals under 2 years, and maintaining liquidity. High-yield savings accounts at 4–5% APY at least partially offset inflation for shorter-term cash needs. Anything beyond 2–3 years needs to be invested.

Switch to the "Inflation Impact" tab above. Enter an original amount, a start year and end year, and set the average annual inflation rate (default is 3.1% — the US long-run average). The calculator shows the equivalent value in today's purchasing power, cumulative inflation percentage, how much purchasing power was lost, and a decade-by-decade breakdown. The US average since 2000 is 3.1%; since 2020 it was closer to 5.8%.