💰 Finance & Money

Finance & Money Calculators

Free financial calculators for loans, mortgages, investing, taxes, budgeting, retirement, business metrics and more. Make smarter money decisions with instant, accurate results.

Thank you for reading this post, don't forget to subscribe!
💰 Finance & Money Tools

What Are Financial Calculators?

Financial calculators help you make better money decisions by turning your numbers into clear answers. Whether you’re buying a home, paying off debt, investing for retirement, filing taxes, or budgeting your monthly income, these tools do the maths that financial planning depends on. Every calculator is free, runs in your browser, requires no sign-up, and keeps your financial data private — nothing is uploaded or stored.

This is the largest category on NerdyTools, with 142 calculators covering loans and mortgages, investing and compound growth, taxes, income and salary, budgeting, debt payoff, retirement planning, business metrics, SaaS analytics, marketing ROI, and country-specific deductions for the US, UK and Australia.

Loans & Mortgages

Borrowing money is one of the biggest financial decisions most people make. The mortgage calculator estimates monthly payments, total interest, and amortisation schedules. The mortgage affordability calculator tells you how much house you can afford. The auto loan calculator does the same for car purchases, and the loan comparison calculator lets you compare two loan offers side by side. The lease calculator helps you compare leasing vs buying any asset.

Monthly Payment (EMI):
M = P × r × (1+r)^n / ((1+r)^n − 1)

P = principal · r = monthly rate · n = payments

Example: $300,000 at 6.5% for 30 years
M = $1,896/month · Total interest = $382,633

Business Metrics & SaaS

Business owners and SaaS founders need their own set of financial tools. The MRR calculator and ARR calculator track subscription revenue. The burn rate calculator and runway calculator monitor cash sustainability. The CAC calculator and LTV calculator measure acquisition economics. The CPA calculator shows your cost per acquisition and maximum profitable CPA from margin. The churn rate calculator, EBITDA calculator, working capital calculator, and contribution margin calculator round out the essential business finance toolkit.

Marketing & Revenue

Measure your paid marketing with the ROAS calculator, CPC calculator, CPM calculator, and conversion rate calculator. See whether your email campaigns pay off with the email marketing ROI calculator. Price your freelance or contract work with the freelance hourly rate calculator and day rate calculator.

Investing & Compound Growth

The compound interest calculator shows how money grows exponentially over time. The CAGR calculator reveals the true annualised growth rate of any investment. The depreciation calculator shows how assets lose value over time using straight-line or diminishing value methods. The payback period calculator shows how long to recover any investment. The ROI calculator measures returns as a percentage across any time frame.

💡 The difference between starting to invest at 25 vs 35 can be hundreds of thousands of dollars by retirement — because of compound growth. Use the compound interest calculator to see the impact of time on your money.

Taxes & Income

The income tax calculator estimates federal liability. The payroll tax calculator shows employer payroll tax obligations by state. The bonus tax calculator shows withholding on lump-sum payments. The overtime pay calculator computes time-and-a-half earnings. The salary increase calculator converts a raise percentage into real dollars and checks it against inflation. The leave payout calculator values unused annual leave on exit.

Important Disclaimer

These calculators provide estimates based on the inputs you enter and standard financial formulas. They are for educational and planning purposes only and do not constitute financial, tax, or legal advice. Always consult a qualified financial advisor, tax professional, or accountant before making significant financial decisions.

Frequently Asked Questions

How do I calculate my mortgage payment?
Enter your loan amount, interest rate, and loan term into the mortgage calculator. It gives you the monthly payment, total interest over the life of the loan, and a full amortisation schedule.
What’s the difference between debt snowball and debt avalanche?
The snowball method pays off the smallest balance first for quick wins. The avalanche method pays off the highest interest rate first to minimise total interest. Avalanche saves more money mathematically; snowball is easier to stick with psychologically.
What is ROAS and why does it matter?
ROAS (return on ad spend) measures revenue earned per dollar of advertising cost. The ROAS calculator also shows your break-even ROAS based on margin — because a high ROAS on a low-margin product can still lose money.
How do I calculate MRR?
Multiply subscribers on each plan by the plan’s monthly price and sum across all plans. The MRR calculator handles multiple pricing tiers and shows ARR, ARPU, and a per-plan breakdown.
How do I figure out my take-home pay?
Enter your gross salary into the salary calculator or paycheck calculator. They deduct estimated taxes and show your net pay across different pay periods.
What is compound interest?
Compound interest is interest calculated on both the initial principal and the accumulated interest from previous periods — “interest on interest.” The compound interest calculator shows the exponential growth effect clearly.
Are my financial details private?
Yes. Every calculator runs entirely in your browser — no financial data is uploaded, stored, or shared with anyone. You can enter your real numbers with complete privacy.
Are these calculators free?
Completely free, no sign-up, no limits. All 142 financial calculators run in your browser on any device.
Explore Other Categories
🏃 Health & Fitness🧮 Math & Algebra📅 Date & Time💻 Web & Developer✍️ Text & Writing🖼️ Image Tools🚗 Automotive🏠 Home & Construction🔄 Unit & Currency☪️ Islamic & Cultural🤖 AI & Productivity
Popular Finance Tools
🏦Mortgage Calculator 📈Compound Interest 🏖️Retirement Calculator 💳MRR Calculator 📊ROAS Calculator 🔥Burn Rate Calculator
Scroll to Top