Qalculators

Blog

Guides that explain the numbers behind mortgages, health metrics, taxes, and daily decisions.

2026-08-24β€’6 min read

Best fee calculators before you publish a price

Three cuts to run before the listing goes live: PayPal, Stripe, and the marketplace on top.

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business
2026-08-24β€’6 min read

Best PayPal fee calculator before you invoice

See take-home and the list price that survives 2.9% + $0.30.

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business
2026-08-24β€’6 min read

Stripe vs PayPal fees on the same $100

Same percent and fixed fee can still differ if one adds FX or a payout delay. Compare take-home, not the logo.

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business
2026-08-24β€’6 min read

How much to charge so marketplace fees do not eat the sale

Platform percent plus card fee is not one percent. Reverse both before you hit publish.

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business
2026-08-19β€’6 min read

How marketplace fees change your real price

PayPal, Stripe, Amazon, Etsy, and freelance platforms take a cut before you get paid. Here is how to reverse the fee so the price you publish still covers your cost.

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business
2025-12-22β€’4 min read

Why VAT Knowledge is Crucial for Freelancers and Small Businesses

A deep dive into Value Added Tax (VAT), how it affects your pricing strategy, and how to use calculators to manage your tax obligations efficiently.

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business
2025-12-15β€’10 min read

Rent or Buy? The Ultimate Real Estate Math Guide

It's not just about the monthly payment. We analyze property taxes, maintenance, equity, and opportunity costs to help you decide.

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business