Unit converter
Compare thickness, dimensions, area, grammage and mass without mixing measurement types.
Convert unitsFOR ROLL MATERIAL BUYERS
Less guesswork.
A clearer roll order.
Convert specifications, work out material quantities and prepare a useful inquiry. Free tools, no sign-up required.
Sample grammage calculator
Calculate finished-material GSM from a measured rectangular sample—or several equal-sized samples weighed together.
Measure grammagePackage volume & volumetric weight
Estimate package volume and dimensional weight using outside measurements and the divisor supplied by your carrier.
Check shipment sizeRoll area & net weight
Turn roll width, length and quantity into order area. Add measured grammage to estimate net material weight.
Calculate an orderSlitting yield calculator
Explore equal-width slitting layouts from a master roll and compare the remaining width.
Plan a slit widthRoll length calculator
Estimate roll length from diameter or cross-check it using net material weight, grammage and width.
Estimate roll lengthInquiry brief builder
Build an editable English buying brief. Keep unknown specifications visible and copy, download or add it to an inquiry.
Prepare a briefUse your own measurements
Prefilled values are examples, not confirmed LTH product specifications. Supplier dimensions, measured grammage and production tolerances need to be checked for your specific construction.
From calculation to conversation
Use the inquiry brief builder to organise known dimensions and mark anything that needs confirmation. Explore roll materials when you are ready to compare constructions.
The unit, sample, area, packaging and inquiry tools run calculations and draft generation in your browser. An inquiry is sent only when you submit the inquiry form. See our privacy policy for site analytics.