Finance Calculators
Free finance calculators for mortgages, loans, compound interest and more.
Example: $10,000 at 5% for 10 years → $6,416 (compound interest earned)
Which Finance Calculator Should You Use?
📈 Grow your savings
Use Compound Interest Calculator to see how your investments grow over time with compounding.
🏠 Buy a home
Use Mortgage Calculator to estimate monthly payments and compare loan terms.
💵 Set prices profitably
Use Margin & Markup Calculator to find optimal pricing and break-even points.
🏦 Plan a loan
Use Loan Calculator to compare offers and see full amortization schedules.
💳 Pay off debt
Use Debt Payoff Calculator to compare snowball vs avalanche strategies.
🎯 Save for a goal
Use Savings Goal Calculator to plan monthly contributions with inflation adjustment.
Finance Calculators at a Glance
Quick-reference comparison of financial calculators and what they help you plan.
| Calculator | Best For | Key Feature |
|---|---|---|
| Compound Interest | Long-term investing | Inflation-adjusted real returns |
| Simple Interest | Short-term loans | Interest solver + vs compound comparison |
| Margin & Markup | Pricing strategy | Break-even with fixed overhead costs |
| Loan Calculator | Borrowing decisions | Side-by-side loan comparison |
| Mortgage Calculator | Home buying | PMI, taxes, insurance included |
| Investment Return | Portfolio analysis | CAGR and nominal vs real returns |
| Debt Payoff | Debt reduction | Snowball vs avalanche comparison |
| Savings Goal | Goal planning | Inflation-adjusted timeline |
Popular Finance Calculators
Compound Interest Calculator — $10K→$16K+ in 10 Years
See how $10,000 grows at 5% with monthly compounding. Includes inflation-adjusted real returns to show true purchasing power.
Mortgage Calculator with PMI & Taxes
Compare 15-year vs 30-year mortgages side by side. Includes property tax, insurance, and PMI for a true monthly payment estimate.
Margin & Markup Calculator with Break-Even
Convert between margin and markup instantly. Add fixed overhead costs for a complete break-even analysis.
All Finance Calculators
Quick-reference table of every finance calculator available on GM Calculator.
| Calculator | Best For | Link |
|---|---|---|
| 💵 Simple Interest Calculator | Calculate simple interest on loans and investments with straightforward linear growth. | Use Tool → |
| 📈 Compound Interest Calculator | Calculate compound interest with inflation-adjusted returns. | Use Tool → |
| 📊 Margin & Markup Calculator | Calculate profit margin, markup percentage, and selling price from cost and revenue. | Use Tool → |
| 🏦 Loan Calculator | Calculate monthly loan payments, total interest, and amortization schedule. | Use Tool → |
| 🏠 Mortgage Calculator | Calculate monthly mortgage payments, total interest, and affordability. | Use Tool → |
| 🎯 Savings Goal Calculator | Calculate how much you need to save monthly to reach your financial goals. | Use Tool → |
| 💳 Debt Payoff Calculator | Calculate the fastest way to pay off debt with optimized payment strategies. | Use Tool → |
| 📉 Investment Return Calculator | Calculate investment returns, compound growth, and total value over time. | Use Tool → |
Finance Calculator FAQs
Everything you need to know about financial calculations and metrics
What is the difference between simple and compound interest?
Simple interest is calculated only on the principal amount — it grows linearly over time. Compound interest is calculated on both the principal and accumulated interest — it grows exponentially. For example, $10,000 at 5% simple interest earns $500 per year. With compound interest, the interest itself earns interest, resulting in faster growth. Use our Compound Interest Calculator to see the difference.
How does compound interest work with inflation adjustment?
Inflation reduces the purchasing power of money over time. Our Compound Interest Calculator shows both nominal growth (raw returns) and real returns (adjusted for inflation). For example, at 8% nominal return with 3% inflation, your real return is approximately 5%. This helps you understand true wealth growth.
What is profit margin vs markup?
Profit margin is the percentage of revenue that is profit (profit ÷ revenue × 100). Markup is the percentage added to cost to set the selling price ((price - cost) ÷ cost × 100). A 50% markup equals a 33% profit margin. Use our Margin Calculator to convert between the two and optimize your pricing.
How do you calculate compound interest with monthly contributions?
Our Compound Interest Calculator supports regular monthly contributions. The formula accounts for each contribution growing at the compound rate for its respective time period. You can see both the final amount and a year-by-year breakdown chart showing how your principal and contributions grow separately.
What is the Rule of 72 for compound interest?
The Rule of 72 is a quick way to estimate how long it takes to double your money. Divide 72 by your annual interest rate. For example, at 8% return: 72 ÷ 8 = 9 years to double. At 12%: 72 ÷ 12 = 6 years. Use our Compound Interest Calculator for precise calculations.
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Reviewed by James Rodriguez, CFA
Finance & Investment AnalystChartered Financial Analyst with 10+ years in investment research and financial planning.