Financial & Business Calculators Directory
Browse our complete collection of mathematically rigorous calculators. Every tool operates 100% in your browser without tracking or data harvesting.
Available Calculators
Payment Gateway Fees
Compare transaction processing fees for Stripe, PayPal, and custom gateways, or calculate the exact invoice amount needed to receive your target net payout.
Profit Margin & Markup
Calculate gross profit, profit margin percentage, markup percentage, and required selling price for target margin thresholds.
Break-Even Point
Determine the exact unit sales volume and gross revenue required to fully cover fixed operating overheads and per-unit variable costs.
ROAS & Ad Spend
Measure return on ad spend, cost per acquisition (CPA), gross profit, and true net profit after product COGS across digital advertising campaigns.
Conversion Rate & CPA
Analyze traffic conversion efficiency, cost per click (CPC), cost per acquisition (CPA), and projected visitor traffic required for sales milestones.
Landed Cost & Pricing
Calculate total unit landed cost (manufacturing, international freight, customs duties, packaging) and determine profitable retail selling prices.
Freelance Rate Formula
Convert your target annual take-home salary into sustainable hourly, day, and weekly billing rates factoring self-employment taxes, healthcare, and non-billable hours.
Invoice Late Interest
Calculate statutory and contractual late payment interest, daily accrual amounts, and debt recovery compensation on overdue commercial invoices.
Compound Interest Growth
Project future investment balance, total principal deposits, and compound interest earnings over time with regular monthly recurring contributions.
Loan & Monthly EMI
Calculate monthly loan EMI payments, total interest cost, and principal vs. interest amortization breakdown for commercial, auto, and personal loans.
Customer LTV (CLV)
Forecast aggregate lifetime value per customer based on average order value, purchase frequency, customer lifespan, and target 3:1 LTV:CAC ratios.
Net Salary & Tax Payout
Calculate net annual, monthly, bi-weekly, and weekly take-home salary after estimated income tax withholdings and pre-tax deductions.