# Darmowe kalkulatory i narzędzia dla sprzedawców internetowych

W kilka sekund oblicz opłaty, ceny, marże, podatki i wzrost. Wszystkie narzędzia są darmowe, działają w przeglądarce i nie wymagają rejestracji.

## Revenue Split Calculator

Split revenue between partners after platform and payment fees.

[Otwórz narzędzie](/pl/tools/revenue-split-calculator)

## Break-Even Price Calculator

Find the lowest price and the monthly sales you need to break even, fees included.

[Otwórz narzędzie](/pl/tools/break-even-calculator)

## Gumroad Fee Calculator

See Gumroad's 2026 fees and your payout for direct, Discover, card and PayPal sales.

[Otwórz narzędzie](/pl/tools/gumroad-fee-calculator)

## Product Pricing Calculator

Price an ebook, course or template from your income goal, audience and conversion rate.

[Otwórz narzędzie](/pl/tools/product-pricing-calculator)

## Profit Margin Calculator

Get profit margin, markup and profit per sale, and the price for a target margin.

[Otwórz narzędzie](/pl/tools/profit-margin-calculator)

## Subscription Revenue Calculator

Calculate MRR and ARR and project subscribers and revenue with churn.

[Otwórz narzędzie](/pl/tools/subscription-revenue-calculator)

## Sales Tax & VAT Calculator

Add or remove sales tax or VAT with 2026 rates for US states and 30+ countries.

[Otwórz narzędzie](/pl/tools/sales-tax-calculator)

## Refund Rate Calculator

Get your refund percentage and what refunds really cost, including fees you lose.

[Otwórz narzędzie](/pl/tools/refund-impact-calculator)

## Content ROI Calculator

See whether a post, video or course paid off, counting your time as a cost.

[Otwórz narzędzie](/pl/tools/content-roi-calculator)

## Audience Growth Calculator

Project follower growth, time to your goal, and your real monthly growth rate.

[Otwórz narzędzie](/pl/tools/audience-growth-calculator)

## Discount Profit Calculator

See what a discount does to profit and margin, and the extra sales needed to break even.

[Otwórz narzędzie](/pl/tools/discount-impact-calculator)

## Affiliate Earnings Calculator

Estimate commission per sale, earnings per click and monthly affiliate income.

[Otwórz narzędzie](/pl/tools/affiliate-earnings-calculator)

## YouTube Money Calculator

Convert YouTube views to money with real RPM ranges by niche.

[Otwórz narzędzie](/pl/tools/youtube-money-calculator)

## Coupon Code Generator

Create unique promo and discount codes in bulk and download them as CSV.

[Otwórz narzędzie](/pl/tools/coupon-code-generator)

## Stripe Fee Calculator

See Stripe's 2026 fees by country, or what to charge to receive an exact amount.

[Otwórz narzędzie](/pl/tools/stripe-fee-calculator)

## Business Idea Validator

Score your business or startup idea across six questions with AI.

[Otwórz narzędzie](/pl/tools/idea-validator)

Canonical URL: https://crevio.co/pl/tools