PDF & Documents Ready to use
Postage Weight Estimator
Estimates postage from piece weight and mail class.
How to use
- 1Open the Postage Weight Estimator tool page.
- 2Enter or paste your input into the provided fields.
- 3The tool processes your input instantly in your browser.
- 4Copy or download the result using the buttons provided.
Privacy & limitations
- Processing happens locally in your browser — nothing is uploaded.
- Works on modern desktop and mobile browsers.
- Very large inputs may take a moment; the interface will show progress.
Related tools
Spine Width Calculator
Calculates finished book spine thickness in mm or inches from page count, paper caliper, and cover board weight.
PDF & Documents
Book Block Thickness Estimator
Predicts total book block depth from sheet count, paper bulk factor, and swell allowance.
PDF & Documents
Paperback Spine Text Width Planner
Computes the maximum readable spine text width from final spine thickness.
PDF & Documents
Hardcover Case Board Calculator
Works out case board dimensions from trim size, overhang, and hinge allowances.
PDF & Documents
Case Wrap Cloth Yield Calculator
Estimates cloth or paper wrap area needed for a given case size and turn-in width.
PDF & Documents
Dust Jacket Flap Width Calculator
Computes flap width and fold positions from trim size and jacket coverage goals.
PDF & Documents
Dust Jacket Spine Score Planner
Places spine score lines and fold marks from trim, bleed, and board thickness inputs.
PDF & Documents
Endpaper Size Calculator
Calculates endpaper sheet size from trim size, trimming allowance, and guard margin.
PDF & Documents