Why we built this
Most recipe sites are written for whichever measurement system the author grew up with, and the rest of us are left doing awkward math or guessing. We wanted a converter that didn't just multiply a cup by a fixed number and call it done, because that approach quietly gets baking wrong. A cup of flour is nowhere near the same weight as a cup of honey, and treating them the same is how recipes end up too dry or too dense.
So Convertly was built around real ingredient data instead of a single blanket conversion rate. Paste a whole recipe in, pick the unit you want, and every line converts using the actual density of that ingredient where we have it.
How the conversions actually work
Volume and weight are not the same kind of measurement, which is the whole reason cups to grams conversions are tricky in the first place. Convertly keeps a table of gram per milliliter values for dozens of common baking ingredients, sourced from the USDA FoodData Central database, and uses that to convert between volume units like cups or tablespoons and weight units like grams or ounces. If an ingredient isn't recognized, that line is left as it was instead of guessing, so nothing gets silently wrong.
What we believe about tools like this
A recipe converter doesn't need your email address, an account, or a subscription. Convertly runs entirely in your browser. What you paste in never leaves your device, nothing is saved once you close the tab, and there's no sign up standing between you and a converted recipe. The site is supported by a small amount of advertising rather than a paywall, and you can read exactly what that involves on the .
Ready to convert a recipe? Paste it in, pick a unit, and every ingredient updates at once.
Try the recipe converter →Convertly does not run its own tracking or analytics, and there is no account system. This page does not load any ad scripts directly, but our homepage does (Google AdSense). Because that's the same site domain, advertising cookies from the homepage can still be present in your browser here. See "Cookies and storage" below.
What stays on your device
Everything you type into the recipe input on our main tool is processed locally inside your browser. It never leaves your device, and closing the tab clears it permanently.
External requests
This page loads two font families from Google Fonts. No ad scripts are loaded on this page.
Cookies and storage
This page does not set cookies directly. If you've visited our homepage, Google AdSense may have set advertising cookies for this domain. See the homepage's privacy notice for details and opt out instructions.
Ingredient density data
Density values are sourced from the USDA FoodData Central database, which is a publicly available US government dataset. It is bundled into the page and does not require any outbound request to use.
FAQ
Common questions
Yes, completely free. There is no account, no paywall, and no limit on how many recipes you convert.
No. Everything you paste is processed locally in your own browser. Nothing is uploaded or saved anywhere, and closing the tab clears it for good.
A cup of flour and a cup of water weigh very different amounts, because they pack differently. Convertly looks up each ingredient's real density so a cup of flour comes out around 120 grams instead of being treated the same as a cup of water at 240 grams.
Convertly is an independent, small side project built by someone who got tired of recipes that only listed cups and ounces. It isn't run by a large company.