# Calculateurs et outils gratuits pour les vendeurs en ligne

Calculez vos frais, vos prix, vos marges, vos taxes et votre croissance en quelques secondes. Tous les outils sont gratuits, fonctionnent dans votre navigateur et ne nécessitent aucune inscription.

## Revenue Split Calculator

Split revenue between partners after platform and payment fees.

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## Break-Even Price Calculator

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

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## Gumroad Fee Calculator

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

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## Product Pricing Calculator

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

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## Profit Margin Calculator

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

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## Subscription Revenue Calculator

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

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## Sales Tax & VAT Calculator

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

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## Refund Rate Calculator

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

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## Content ROI Calculator

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

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## Audience Growth Calculator

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

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## Discount Profit Calculator

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

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## Affiliate Earnings Calculator

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

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## YouTube Money Calculator

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

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## Coupon Code Generator

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

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## Stripe Fee Calculator

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

[Ouvrir l’outil](/fr/tools/stripe-fee-calculator)

## Business Idea Validator

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

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