What These Calculators Do
Our finance calculators help you answer common money questions quickly. See how your savings grow with compound interest, split a restaurant bill fairly, or figure out the right tip amount — all without spreadsheets or manual math.
Each tool is designed for speed and clarity. Enter your numbers, get your answer, and move on.
Featured Calculators
See how your money grows over time with compound interest. Calculate final balance and total interest earned.
Calculate tips at restaurants, split bills among friends, and round up totals for convenience.
Solve any percentage problem quickly — find percent of a number, percentage change, increase, or decrease.
Compound Interest Calculator
Compound interest is interest earned on both your original deposit and the interest that has already accumulated. Over time, this creates exponential growth — your money earns money.
What you can calculate:
- Final balance after a set period
- Total interest earned
- How different compounding frequencies (daily, monthly, annually) affect returns
- The impact of regular contributions
This tool is useful for evaluating savings accounts, comparing investment options, or understanding the true cost of loans. The U.S. Securities and Exchange Commission provides additional resources on how compounding works.
Tip Calculator
Calculate tips at any percentage and split bills among multiple people. No more awkward math at the table.
Common tip percentages in the U.S.:
- 15% — Standard service
- 18–20% — Good to excellent service
- 25%+ — Exceptional service
The calculator also handles bill splitting, showing each person's share including tip.
Percentage Calculator
Percentages come up constantly in financial decisions: discounts, taxes, interest rates, investment returns.
What you can calculate:
- What is X% of Y?
- X is what percent of Y?
- Percentage change between two values
- Increase or decrease a number by X%
Understanding percentages helps you compare options, spot good deals, and make informed financial choices.
Frequently Asked Questions
How does compound interest differ from simple interest?
Simple interest is calculated only on the original principal. Compound interest is calculated on the principal plus accumulated interest, so your money grows faster over time.
What compounding frequency gives the best returns?
More frequent compounding (daily vs. annually) results in slightly higher returns. The difference becomes more significant with larger amounts and longer time periods.
How much should I tip?
In the United States, 15–20% is standard for restaurant service. 15% for adequate service, 18–20% for good to excellent service. Tipping customs vary by country.