Convert Grams Flour to Cups – Kitchen Converter
This converter estimates US cups from a weight in grams for common flours using empirically measured bulk-density values and selectable measuring methods. Because a cup measures volume and grams measure mass, the conversion depends on the flour type and how the flour was placed into the cup (spooned, scooped, sifted).
Select the flour type and measuring method to use the built-in density table, or choose the custom-density method to input a known grams-per-cup value. For precise work and regulatory compliance, use a calibrated scale and report mass rather than volume.
Governance
Record d8ff907c4c7c • Reviewed by Fidamen Standards Committee
Uses a measured bulk-density table for common flour types and measuring techniques (spooned/leveled, scooped/packed, sifted) to convert grams to US cups.
Inputs
Results
Cups (US cup)
CUP 0.80
| Output | Value | Unit |
|---|---|---|
| Cups (US cup) | CUP 0.80 | cup |
Visualization
Methodology
Conversions use the relationship cups = grams / (grams per US cup). The table values represent typical bulk densities for US customary measuring cups and common flour types, derived from published food composition resources and laboratory bulk-density measurements.
Measurement uncertainty depends on material bulk density variability, moisture content, and measuring technique. For traceable accuracy follow NIST recommendations for mass measurement and ISO/NIST calibration procedures for scales. When accuracy is required for nutrition labeling or regulated product specifications, follow applicable standards (NIST, ISO, AOAC) and use mass-based measurements.
Worked examples
Example 1: 250 g of all-purpose flour, spooned & leveled (125 g per cup) → 250 ÷ 125 = 2.00 cups.
Example 2: 120 g of cake flour, sifted (approx. 90 g per cup) → 120 ÷ 90 ≈ 1.33 cups.
Example 3 (custom): If you measured density as 130 g per cup, 260 g → 260 ÷ 130 = 2.00 cups.
F.A.Q.
Why do conversion numbers for '1 cup' vary between sources?
A cup is a volume unit; the mass of one cup depends on bulk density, which changes with flour type, moisture, particle size, and how compacted the flour is. Different measuring techniques (scooping vs spooning vs sifting) change the packed volume and therefore the grams per cup.
Is it better to measure flour by weight or by cups?
For repeatability and accuracy—especially in baking and regulated formulations—measure by mass (grams) using a calibrated scale. Volume measures (cups) are convenient but introduce variability.
What accuracy can I expect from this converter?
Typical uncertainty from packing and flour variability is on the order of ±5–15%. For critical uses, perform your own bulk-density measurement and use the custom-density mode or follow NIST/ISO scale calibration procedures for mass-based measurement.
Does this use US or metric cup?
This converter uses the US customary cup (commonly treated as 240 milliliters for culinary conversions). If you need a different cup definition, use the custom-density mode with a density adjusted for that cup volume.
Where do the density numbers come from?
Density values are representative typical bulk densities compiled from food composition references and laboratory measurements. They are intended for general cooking and recipe conversion, not as legally binding values for commercial labeling unless verified by lab measurement.
Sources & citations
- NIST - Weights and Measures / Metrology for Mass — https://www.nist.gov/pml/weights-and-measures
- ISO - International Organization for Standardization — https://www.iso.org
- USDA Food Data / FoodData Central — https://fdc.nal.usda.gov
- AOAC International - Official Methods and Measurement Guidance — https://www.aoac.org
Further resources
Versioning & Change Control
Audit record (versions, QA runs, reviewer sign-off, and evidence).
Record ID: d8ff907c4c7cWhat changed (latest)
v1.0.0 • 2025-11-11 • MINOR
Initial publication and governance baseline.
Why: Published with reviewed formulas, unit definitions, and UX controls.
Public QA status
PASS — golden 25 + edge 120
Last run: 2026-01-23 • Run: golden-edge-2026-01-23
Versioning & Change Control
Audit record (versions, QA runs, reviewer sign-off, and evidence).
What changed (latest)
v1.0.0 • 2025-11-11 • MINOR
Initial publication and governance baseline.
Why: Published with reviewed formulas, unit definitions, and UX controls.
Public QA status
PASS — golden 25 + edge 120
Last run: 2026-01-23 • Run: golden-edge-2026-01-23
Engine
v1.0.0
Data
Baseline (no external datasets)
Content
v1.0.0
UI
v1.0.0
Governance
Last updated: Nov 11, 2025
Reviewed by: Fidamen Standards Committee (Review board)
Credentials: Internal QA
Risk level: low
Reviewer profile (entity)
Fidamen Standards Committee
Review board
Internal QA
Entity ID: https://fidamen.com/reviewers/fidamen-standards-committee#person
Semantic versioning
- MAJOR: Calculation outputs can change for the same inputs (formula, rounding policy, assumptions).
- MINOR: New features or fields that do not change existing outputs for the same inputs.
- PATCH: Bug fixes, copy edits, or accessibility changes that do not change intended outputs except for previously incorrect cases.
Review protocol
- Verify formulas and unit definitions against primary standards or datasets.
- Run golden-case regression suite and edge-case suite.
- Record reviewer sign-off with credentials and scope.
- Document assumptions, limitations, and jurisdiction applicability.
Assumptions & limitations
- Uses exact unit definitions from the Fidamen conversion library.
- Internal calculations use double precision; display rounding follows the unit's configured decimal places.
- Not a substitute for calibrated instruments in regulated contexts.
- Jurisdiction-specific rules may require official guidance.
Change log
v1.0.0 • 2025-11-11 • MINOR
Initial publication and governance baseline.
Why: Published with reviewed formulas, unit definitions, and UX controls.
Areas: engine, content, ui • Reviewer: Fidamen Standards Committee • Entry ID: cedfec532e23