Curtain Fabric Planner
Estimate curtain fabric length from width, fullness and hem allowances.
Your inputs
Calculation results
Formula & assumptions
Widths = ceiling(window width × fullness/fabric width); no pattern repeat included.
Values use the specified units. Calculations use floating-point arithmetic. Check input measurements and formula assumptions before applying the result.
Compare your scenarios
Save up to five results to compare changes side by side. Scenarios stay in this tab until you clear or reload it.
Using Curtain Fabric Planner
Estimate curtain fabric length from width, fullness and hem allowances.
- Enter window width, fullness multiplier, fabric width, finished drop, hem allowance using the units printed under each field.
- Choose Calculate, or enable live updates. Review the result labels and formula assumptions.
- Save scenarios to compare up to five variations, then copy the report or download JSON or CSV.
Example
Window width: 200 centimeters Fullness multiplier: 2 ratio Fabric width: 140 centimeters Finished drop: 240 centimeters Hem allowance: 30 centimeters Fabric widths: 3 Total fabric · meters: 8.1 Cut drop · centimeters: 270
Questions & answers
What does Curtain Fabric Planner calculate?
Estimate curtain fabric length from width, fullness and hem allowances.
Which units should I enter?
Window width uses centimeters. Fullness multiplier uses ratio. Fabric width uses centimeters. Finished drop uses centimeters. Hem allowance uses centimeters. Convert values to these units before calculating.
Which formula does it use?
Widths = ceiling(window width × fullness/fabric width); no pattern repeat included.
What does the included example show?
Window width: 200 centimeters; Fullness multiplier: 2 ratio; Fabric width: 140 centimeters; Finished drop: 240 centimeters; Hem allowance: 30 centimeters. Result: Fabric widths = 3; Total fabric · meters = 8.1; Cut drop · centimeters = 270.
Can I compare different settings?
Yes. Save a scenario, change the inputs and save another result. Up to five scenarios are compared in this tab; they disappear when you reload or leave.
Can I export the calculation?
Copy the JSON report or download JSON and CSV with inputs, result labels and numeric values. Processing uses local JavaScript; no calculation request is sent to our server. Displayed values use up to 10 significant digits; exports retain JavaScript numeric precision.
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