Yeast conversion converter
7 g of active dry yeast equals 5.25 g of instant or 21 g of fresh yeast. Enter the amount and kind your recipe calls for and get all three equivalents in the same unit, so the dough is never under- or over-dosed. Free in your browser.
- Free
- Runs in your browser
- No sign-up
- Your data stays on your device
Run — free
Worked example
- Amount
- 7
- Source yeast type: active_dry
- active_dry
- Type label
- active dry yeast
- Active dry
- 7
- Instant
- 5.25
- Fresh
- 21
Home bakers and professional kitchens often stock one form of yeast while a recipe calls for another. Active dry yeast, instant (rapid-rise) yeast, and fresh cake yeast are not interchangeable cup for cup by weight: instant is more concentrated than active dry, and fresh compressed yeast needs a larger mass for the same leavening power. This yeast conversion converter applies a fixed, transparent ratio of one part active dry to three-quarters part instant to three parts fresh, returns all three equivalents from a single amount and type, and fails clearly when the yeast type is unknown so you never silently under- or over-dose a dough.
Yeast types, the fixed ratio, and how to choose your input
Three commercial yeast forms dominate bread and pizza recipes. Active dry yeast (ADY) is granular, often dissolved in warm water before mixing, and serves as the reference base in this converter. Instant yeast, also sold as rapid-rise, quick-rise, or bread-machine yeast, is more finely milled and more potent by weight, so you typically use less of it than active dry for the same rise.
Fresh yeast, also called cake yeast or compressed yeast, is a moist block that is less concentrated, so recipes need roughly three times the mass of active dry. The engine uses the conventional kitchen ratio active dry to instant to fresh equals one to zero point seven five to three. Send the required field amount as a finite non-negative number (or numeric string) in whatever unit your recipe uses—grams, teaspoons, or packets—and keep that unit consistent across the three outputs.
The algorithm first divides your amount by the factor for that type to recover an active-dry base, then multiplies by each factor to emit the three equivalents.
What you can do with it
Home baking substitutions
A recipe calls for 7 g active dry yeast but the pantry only has instant or a fresh cake; convert once and measure the equivalent without guessing.
Recipe apps and meal kits
Platforms normalize user-selected yeast forms into a single internal base, then display ADY, instant, and fresh amounts on the shopping list.
Bakery and training pipelines
Schools and production bakers pin deterministic yeast equivalents in tests and SOPs so every station uses the same fixed ratios.
FAQ
How do I convert active dry yeast to instant yeast?
Read the instant field in the response; with the fixed ratio it is 0.75 times the active dry amount.
What ratio does this yeast conversion converter use?
Instant is treated as more potent; fresh cake yeast needs about three times the mass of active dry.
Is the yeast conversion converter free?
The browser tool runs free on your device.
Does the unit matter (grams vs teaspoons)?
Use any consistent unit for amount. The converter scales pure numbers with fixed ratios; it does not change units, so grams in means gram-equivalents out for all three types.
How much fresh yeast replaces 7 g of active dry yeast?
21 grams, three times as much. Fresh cake yeast is a moist, less concentrated block, so it needs more mass for the same rise. The same 7 grams of active dry would be 5.25 grams of instant.
Related tools
For developers — API access
Everything on this page is available programmatically. This section is for teams who want to wire it into their own systems; everyone else can just use the tool above.
API endpoint
Prefer to automate it? One authenticated POST creates the task; the result comes back by webhook or a signed link. The same capability also runs here on the web, by email and from Telegram — and soon from our app too.
Call it from your stack
curl -X POST https://api.kit.forhosting.com/cook/yeast \
-H "Authorization: Bearer $KIT_KEY" \
-H "Content-Type: application/json" \
-d '{"amount":7,"type":"active_dry"}'const res = await fetch("https://api.kit.forhosting.com/cook/yeast", {
method: "POST",
headers: {
"Authorization": `Bearer ${process.env.KIT_KEY}`,
"Content-Type": "application/json"
},
body: JSON.stringify({
"amount": 7,
"type": "active_dry"
})
});
const { task_id } = await res.json();import os, requests
res = requests.post(
"https://api.kit.forhosting.com/cook/yeast",
headers={"Authorization": f"Bearer {os.environ['KIT_KEY']}"},
json={
"amount": 7,
"type": "active_dry"
},
)
task_id = res.json()["task_id"]<?php
$res = file_get_contents("https://api.kit.forhosting.com/cook/yeast", false, stream_context_create([
"http" => [
"method" => "POST",
"header" => "Authorization: Bearer " . getenv("KIT_KEY") . "\r\nContent-Type: application/json",
"content" => '{"amount":7,"type":"active_dry"}',
],
]));
$task = json_decode($res, true);body := bytes.NewBufferString(`{"amount":7,"type":"active_dry"}`)
req, _ := http.NewRequest("POST", "https://api.kit.forhosting.com/cook/yeast", body)
req.Header.Set("Authorization", "Bearer "+os.Getenv("KIT_KEY"))
req.Header.Set("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)Example request
{
"amount": 7,
"type": "active_dry"
}Example response
{
"task_id": "tsk_a1b2c3d4e5f6a1b2c3d4e5f6",
"type": "cook.yeast",
"status": "queued",
"_links": {
"result": "/tasks/tsk_…/result"
}
}The API is asynchronous: the call returns a task_id immediately and the result arrives by webhook. Polling is capped at 1 req/s per task.
Pricing
Published price — no tokens, no invented credits. A failed task is never charged.
Errors
| HTTP | Code | Meaning |
|---|---|---|
401 | unauthorized | Missing or invalid API key. |
402 | insufficient_balance | Your balance doesn't cover the task price. |
404 | unknown_type | That task type doesn't exist. |
429 | rate_limited | Too many requests. Use the webhook instead of polling. |
Technical notes
Yeast types, the fixed ratio, and how to choose your input
Send type as active_dry, instant, or fresh; case is ignored and common aliases such as ady, idy, rapid, cake, and compressed are accepted. Identical inputs always produce identical JSON because the path is pure arithmetic with no network, no random seed, and no wall clock.
Reading the response fields and handling invalid yeast types
The ratios object restates the fixed factors one, zero point seven five, and three so downstream code can show a legend or recompute without hard-coding magic numbers. Unknown yeast type messages name the bad value and list the supported forms so clients can surface a helpful form error instead of a generic failure. On success the response echoes amount and the canonical type you selected, plus a type_label such as active dry yeast or fresh cake compressed yeast for display. The three numeric fields active_dry, instant, and fresh hold the equivalent quantities in the same unit you supplied, rounded to six decimal places so goldens and UIs stay stable without floating-point noise. The method label is always fixed_yeast_ratios and formula describes the normalize-then-scale steps for transparency in APIs and SDK demos. Use active_dry when a recipe lists ADY and you only have instant jars; use fresh when a European formula specifies cake yeast and your pantry holds dry packets. Missing amount, negative amount, non-finite amount, missing type, and any string that does not resolve to the three supported types all fail with invalid_input and are not charged.
API usage, pricing, bakery workflows, and practical limits
Call the free in-browser yeast conversion converter for home baking, classroom demos, and quick substitutions without installing a spreadsheet or baking app. The converter does not change proofing schedules, water temperature, or salt timing—those remain recipe judgment after you pick the right mass of yeast. Send a JSON body with required amount and type. Use the prepaid API when a recipe platform, bakery ERP, meal-kit tool, or meal-planning pipeline needs a stable contract under KIT balance at $0.002 per successful item; validation failures never consume balance after the engine rejects the request. Pair this endpoint with cup-and-gram converters when the next step is scaling flour or liquids, but keep yeast conversion separate because leavening potency ratios are not the same as ingredient density tables.
Technical questions
What happens if I send an unknown yeast type?
The request fails with invalid_input. Supported types are active_dry, instant, and fresh (plus common aliases). Unknown types are never silently mapped.