Finance Calculators
Take control of your money with free finance calculators - mortgage and loan payments, compound interest, retirement planning, tax estimates, and creator economy earnings after platform fees and taxes.
68 calculators4 categories9 popular tools
Popular Finance Calculators
Rent vs Buy CalculatorCompare total costs of renting vs buying a home over time.Open calculator Rental Property ROI CalculatorCalculate cash flow, cap rate, and ROI for rental properties.Open calculator House Flipping CalculatorCalculate profit and ROI for fix-and-flip real estate investments.Open calculator Mortgage CalculatorCalculate monthly payments, total interest, and amortization.Open calculator Loan CalculatorCalculate payments and interest for any loan type.Open calculator Compound InterestSee how your money grows over time.Open calculator
Real Estate Investing
Rent vs Buy CalculatorPopularCompare total costs of renting vs buying a home over time.Open calculator Rental Property ROI CalculatorPopularCalculate cash flow, cap rate, and ROI for rental properties.Open calculator House Flipping CalculatorPopularCalculate profit and ROI for fix-and-flip real estate investments.Open calculator Cap Rate CalculatorCalculate capitalization rate for real estate investment properties.Open calculator HELOC Payment CalculatorCalculate HELOC payments, interest, and payoff time.Open calculator
Mortgage & Loans
Mortgage CalculatorPopularCalculate monthly payments, total interest, and amortization.Open calculator Loan CalculatorPopularCalculate payments and interest for any loan type.Open calculator Auto Loan CalculatorCalculate car loan payments and total cost.Open calculator Amortization CalculatorView full amortization schedule for loans.Open calculator Student Loan CalculatorCalculate student loan payments and payoff time.Open calculator Credit Card Payoff CalculatorCalculate time and interest to pay off credit cards.Open calculator Debt-to-Income Ratio CalculatorCalculate your DTI ratio for loan eligibility.Open calculator Refinance CalculatorCompare refinancing options and savings.Open calculator
Savings & Investment
Compound InterestPopularSee how your money grows over time.Open calculator ROI CalculatorCalculate return on investment.Open calculator Retirement CalculatorPopularProject savings and income in retirement.Open calculator Inflation CalculatorCalculate purchasing power over time.Open calculator Savings CalculatorProject future savings with regular deposits.Open calculator Budget CalculatorPlan and track your monthly budget.Open calculator Emergency Fund CalculatorCalculate how much emergency savings you need.Open calculator College Savings CalculatorProject 529 plan growth and college costs.Open calculator Travel Budget CalculatorPlan and estimate travel expenses.Open calculator Side Hustle Income CalculatorEstimate side business net income and taxes.Open calculator Wedding Budget CalculatorPlan your wedding budget with detailed expense breakdown.Open calculator Freelance Rate CalculatorCalculate your ideal freelance hourly rate.Open calculator TikTok Earnings CalculatorEstimate TikTok creator revenue from views and followers.Open calculator Airbnb Host Profit CalculatorCalculate Airbnb rental income, expenses, and ROI.Open calculator Notion Template Pricing CalculatorPrice your Notion templates for maximum profit.Open calculator Substack Income CalculatorEstimate Substack newsletter revenue and growth.Open calculator Newsletter Revenue CalculatorCalculate newsletter income from subscriptions, sponsorships & affiliates.Open calculator Membership Site Profit CalculatorCalculate membership site MRR, LTV, and net profit.Open calculator Gumroad Fee CalculatorCalculate net revenue after Gumroad fees, payment processing, and refunds.Open calculator Discord Monetization CalculatorEstimate Discord server revenue from subscriptions, boosts, and ads.Open calculator Medium Partner Earnings CalculatorEstimate Medium writer income from Partner Program and referrals.Open calculator Print-on-Demand Profit CalculatorCalculate POD business profit and margins across platforms.Open calculator Podcast Ad Revenue CalculatorEstimate podcast earnings from ads, sponsorships, and subscriptions.Open calculator Twitch Streamer Earnings CalculatorCalculate Twitch income from subs, bits, ads, and sponsorships.Open calculator Udemy Instructor Earnings CalculatorEstimate Udemy instructor revenue from organic, deals, Business, and Personal Plan.Open calculator Etsy Seller Profit CalculatorCalculate Etsy seller profit, fees, and margins with full cost breakdown.Open calculator YouTube Channel Earnings CalculatorEstimate YouTube channel income from ads, memberships, and sponsorships.Open calculator Amazon KDP Royalty CalculatorCalculate Kindle Direct Publishing royalties for eBooks, paperbacks, and audiobooks.Open calculator Spotify Artist Royalty CalculatorEstimate Spotify streaming royalties by region, distributor, and label split.Open calculator Roblox Developer Earnings CalculatorCalculate Roblox developer revenue from Robux, DevEx, and Premium Payouts.Open calculator Buy Me a Coffee Creator Earnings CalculatorEstimate creator income from memberships, donations, and digital products.Open calculator Teachable Course Earnings CalculatorCalculate online course revenue with Teachable pricing and fee breakdowns.Open calculator Webtoon Creator Earnings CalculatorEstimate webcomic income from ads, subscriptions, Patreon, and merch.Open calculator Skillshare Instructor Earnings CalculatorEstimate Skillshare teacher revenue from royalty pool, referrals, and Originals.Open calculator Redbubble Artist Earnings CalculatorCalculate Redbubble POD artist income across product types and margins.Open calculator Fiverr Seller Profit CalculatorCalculate Fiverr freelancer profit after 20% commission, extras, and tips.Open calculator Kajabi Course Profit CalculatorCalculate Kajabi course profit with pricing plans, fees, and revenue breakdown.Open calculator Cameo Creator Earnings CalculatorEstimate Cameo creator income from personalized videos, live calls, and DMs.Open calculator Turo Host Profit CalculatorCalculate Turo car sharing profit with protection plans and cost breakdown.Open calculator Etsy Shop Profit CalculatorCalculate Etsy shop profit with fee breakdown, ad ROI, and multi-product revenue analysis.Open calculator Gumroad Creator Earnings CalculatorEstimate Gumroad creator income from digital products, memberships, and tips.Open calculator Shutterstock Contributor Earnings CalculatorCalculate stock photo contributor earnings by license type, tier, and download volume.Open calculator GitHub Sponsors Income CalculatorEstimate open-source sponsorship income across tiers with GitHub matching and Stripe fees.Open calculator Kickstarter Campaign ROI CalculatorCalculate crowdfunding ROI with reward tiers, platform fees, and fulfillment costs.Open calculator OnlyFans Earnings CalculatorPopularEstimate OnlyFans income after the 20% fee and taxes.Open calculator Instagram Earnings CalculatorPopularSponsorship and affiliate income after fees and taxes.Open calculator Rumble Earnings CalculatorEstimate Rumble pay per 1000 views with licensing revenue share (60/40, 70/30, 90/10).Open calculator Fansly Earnings CalculatorEstimate Fansly income from subscriptions, PPV, tips, and customs after the 20% fee.Open calculator Fanvue Earnings CalculatorEstimate Fanvue creator income after commission and taxes.Open calculator Fanfix Earnings CalculatorEstimate Fanfix income after the 90/10 platform split and taxes.Open calculator
Tax & Salary
Tax CalculatorCalculate federal tax, effective rate, and take-home pay.Open calculator Salary CalculatorConvert between hourly, weekly, monthly, and annual pay.Open calculator Income Tax CalculatorEstimate federal and state income taxes.Open calculator Sales Tax CalculatorCalculate sales tax for any US state.Open calculator Self-Employment Tax CalculatorEstimate SE tax for self-employed income.Open calculator
Finance Calculator FAQs
What finance calculators are available?
BuildFormulas covers mortgages and loans, savings and investment (compound interest, ROI, retirement), budgeting, taxes and salary, real estate ROI, and a full suite of creator earnings calculators for YouTube, Twitch, OnlyFans, and more.
Are the mortgage and loan calculators accurate?
Yes. They use the standard amortization formula with monthly compounding, and show full payment breakdowns including interest and amortization schedules.
Can I estimate my take-home pay and taxes?
Yes. The Tax Calculator, Income Tax Calculator, and Salary Calculator estimate federal tax, effective rate, and take-home pay, while the Self-Employment Tax Calculator handles 1099 income.
Do creator earnings calculators include platform fees and taxes?
Yes. Creator calculators for OnlyFans, Fansly, Fanvue, Fanfix, Rumble, Twitch, and more model platform fees (10-20%), payout fees, expenses, and taxes so you see your real net income.