How Reise Tools
Actually Works
Free calculators that show their formulas, built specifically for freelancers and 1099 contractors. Here's what makes them different.
Pick a calculator
60+ free tools, organized by what you're trying to figure out
Whether you're trying to understand your quarterly tax bill, set a freelance rate, compare a W-2 offer to a 1099 contract, or project your retirement — there's a Reise tool for it. Tools are organized by category: Career & Income, Financial, Real Estate, Business, and more.
Every tool is free, no account required, and runs entirely in your browser. Your inputs are never stored or transmitted anywhere.
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Run the numbers
Enter your info, get instant results
Every calculator has labeled inputs explaining exactly what to enter. Results update as you type — no form submission, no waiting. You can adjust any input and immediately see how it changes the outcome.
Tools remember your inputs within the session. The Share button generates a URL with your inputs encoded — send it to a client, partner, or accountant so they can see exactly what you saw.
Try a calculatorLive inputs
See the math
Click ShowMath™ — every formula, every step, every variable explained
This is the feature that makes Reise Tools different. Every result has a ShowMath™ panel. Open it and you see the exact formula used, your numbers substituted in, and a plain-English explanation of every variable.
If the SE tax formula uses 92.35% of net earnings, ShowMath™ tells you why (it accounts for the employer-side deduction). If the QBI deduction applies, you see the Section 199A calculation. You walk away understanding the number — not just having it.
See an exampleSE Tax
Net × 92.35% × 15.3%
= $105,000 × 0.9235 × 0.153 = $14,837
QBI Deduction
Taxable Income × 20%
= $76,481 × 20% = $15,296
Take action
Use the results to make better financial decisions
Understanding the number is step one. Step two is deciding what to do with it. Each tool links to related calculators so you can chain results — quarterly taxes into freelance rate, true hourly rate into client proposal pricing, retirement projection into savings rate.
If you're managing proposals, contracts, or client billing as a contractor, ProJobCalc handles the business side — estimate projects, track milestones, and send invoices professionally.
Start with your quarterly taxesChain your results
60+ free calculators. Every result shows the formula. No account, no credit card, no upsell.