Picture Frame Border Calculator
Calculate mat and outer frame dimensions around an image.
Your inputs
Calculation results
Formula & assumptions
Each outer dimension adds twice the mat and frame borders.
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 Picture Frame Border Calculator
Calculate mat and outer frame dimensions around an image.
- Enter image width, image height, mat border, frame border 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
Image width: 30 centimeters Image height: 20 centimeters Mat border: 5 centimeters Frame border: 2 centimeters Mat outer width · centimeters: 40 Mat outer height · centimeters: 30 Frame outer width · centimeters: 44 Frame outer height · centimeters: 34 Mat visible area · square centimeters: 600
Questions & answers
What does Picture Frame Border Calculator calculate?
Calculate mat and outer frame dimensions around an image.
Which units should I enter?
Image width uses centimeters. Image height uses centimeters. Mat border uses centimeters. Frame border uses centimeters. Convert values to these units before calculating.
Which formula does it use?
Each outer dimension adds twice the mat and frame borders.
What does the included example show?
Image width: 30 centimeters; Image height: 20 centimeters; Mat border: 5 centimeters; Frame border: 2 centimeters. Result: Mat outer width · centimeters = 40; Mat outer height · centimeters = 30; Frame outer width · centimeters = 44; Frame outer height · centimeters = 34; Mat visible area · square centimeters = 600.
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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