Instant clarity for every financial decision
12 real-time calculators for freelancers, founders, and digital marketers — no spreadsheets or signups required.
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.
Empowering Smarter Financial Decisions with Real-Time Precision
A practical, privacy-first toolkit built to help entrepreneurs, freelancers, and marketers price, budget, and plan with confidence.
100% Client-Side Privacy
Every number you type is processed instantly inside your own browser. Nothing is uploaded, logged, or stored on a server — your revenue, margins, and rates stay completely private, even from us.
Standard Banking Formulas
Our engine mirrors published benchmark formulas used by global payment processors and standard accounting practices — Stripe and PayPal standard fee schedules, benchmark tax estimation math, and textbook definitions of margin, markup, and break-even.
Built for Entrepreneurs & Freelancers
Designed for speed. Whether you are pricing an e-commerce product, scoping a freelance contract, or reviewing an ad campaign, results update in real time as you type — no page reloads, no waiting.
The Complete Guide to Financial Calculations
Essential mathematical frameworks every online business owner, freelancer, and marketer should master.
Understanding Payment Gateway Cuts
When you sell online, the price a customer pays is not what lands in your account. Stripe and PayPal both charge a percentage plus a small fixed fee per transaction. Use the Payment Fees calculator to see the estimated fee and projected net payout for any sale, or flip it around with the Reverse Invoice Target to calculate what benchmark price to charge so you receive a target amount after fees.
Markup vs. Profit Margin
These two numbers are easy to confuse but mean very different things. Margin is profit as a percentage of your selling price. Markup is profit as a percentage of your cost. A 50% markup on a $10 product is not the same as a 50% margin — use the Profit Margin & Markup tool to compare both instantly and avoid underpricing your products.
Finding Your Break-Even Point
Before a product or service becomes profitable, it must first cover your fixed costs (rent, salaries, subscriptions) and variable costs (materials, per-unit fees). The Break-Even calculator estimates how many units you need to sell — and the revenue that represents — before every additional sale contributes to net profit.
Setting a Sustainable Freelance Rate
Many freelancers price hours without accounting for taxes, non-billable admin work, or time off. The Freelance Rate calculator works backward from your target annual income and realistic billable hours to recommend an hourly and daily rate that actually sustains your business.
Financial Guides & Merchant Insights
Actionable mathematical breakdowns written for modern e-commerce founders and independent consultants.
How Payment Processing Fees Work: Stripe vs. PayPal & Gross-Up Math
Every card payment accepted online passes through acquiring processors and card networks that deduct interchange, assessment, and gateway fees before funds settle into your bank account. Learn the gross-up formula to protect your margins.
Margin vs. Markup: The Comprehensive Guide to Pricing for Profit
Margin and markup both describe profitability, but are calculated from completely different baselines. Mixing them up causes major pricing errors that erode business cash flow and unit economics.
How to Calculate ROAS: Understanding Return on Ad Spend & Break-Even ROAS
Learn how to calculate Return on Ad Spend (ROAS), find your campaign Break-Even ROAS threshold, and measure true bottom-line profitability after product COGS and fulfillment expenses.
How to Calculate Your Business Break-Even Point in Units and Revenue
Determine the exact operational milestone where total business revenues equal total operating overhead and variable expenses. Master unit contribution margins and safety buffer planning.
The Freelancer's Pricing Formula: Setting Sustainable Hourly & Daily Rates
Salaried employees switching to freelancing frequently underprice themselves by dividing annual salary by 2,080 hours. Learn how factoring non-billable overhead, self-employment taxes, and health coverage stabilizes cash flow.
Understanding Customer Lifetime Value (LTV) & The 3:1 LTV:CAC Ratio
Customer Lifetime Value (LTV) is the ultimate metric for subscription and e-commerce growth. Learn how to calculate Profit LTV and benchmark Customer Acquisition Cost (CAC) for sustainable scaling.
Frequently Asked Questions
Clear answers regarding calculation accuracy, client-side data security, and formulas.
Our calculators use standard published 2026 rates for domestic transactions (e.g., Stripe standard 2.9% + $0.30, PayPal standard 3.49% + $0.49). Custom interchange rates and flat fees can also be adjusted directly to match your specific merchant account tier.