Calculator Directory
Search or browse hundreds of free calculators.
Create your personal calculator dashboard
Save your favorite tools, organize them in custom collections, and access everything in one place. Free registration — no credit card required.
- ✓Add calculators to favorites and custom categories
- ✓Quick access from your dashboard
- ✓Works across devices — your list follows you
Popular calculators
Percentage Calculator
Find X% of a number and see how that result compares to the original value.
Open →Compound Interest Calculator
Calculate future value with compound interest and optional monthly contributions.
Open →Loan Calculator
Calculate monthly payment, total interest, and amortization for a fixed-rate loan.
Open →Profit Calculator
Calculate total profit from multiple cost/price/quantity lines with optional discount.
Open →Discount Calculator
Calculate price after percent off or fixed amount off. See how much you save.
Open →Unit Converter
Convert length, weight, and temperature between metric and imperial units.
Open →Profit Margin Calculator
Calculate profit margin from cost and revenue. Find what percentage of revenue is profit.
Open →ROI Calculator
Calculate return on investment. Marketing ROI, ad spend ROI, or any investment return.
Open →Categories
Business & Profit
Profit, margin, ROI, and business metrics calculators.
Ads & Marketing
ROI, CAC, CPC, CPM, ROAS, and ad spend calculators.
Finance
Loan, interest, savings, tax, and retirement calculators.
E-commerce
Pricing, discount, markup, break-even, and wholesale calculators.
SaaS & Startup
MRR, churn, runway, burn rate, and SaaS metrics.
Conversions
Currency, unit, time, weight, length, and temperature converters.
Freelance & Personal
Hourly rate, salary, project pricing, and cost of living.
Real-life
Can I afford this, how much to earn, house affordability.
Math
Percentage, fractions, and basic math tools.
Statistics
Averages, distributions, and statistical tools.
Frequently asked questions
Are these calculators free?
Yes. All calculators on CalcHub are free to use with no sign-up required.
Can I use results for financial decisions?
Our tools are for educational and estimation purposes. For important financial decisions, please consult a qualified professional.
How do I find a specific calculator?
Use the search bar on the homepage or browse by category: Finance, Math, Conversion, or Statistics.