Corrugated Box Weight & Material Calculator

How to use it: enter the RSC length, width and height on one consistent basis, plus converting allowances, the two liner GSM values, medium GSM, measured or specified flute take-up, glue contribution and quantity. If your dimensions are internal finished dimensions, the allowance fields must bridge them to the supplier's scored blank; do not mix internal and external measurements.

Formula. Board GSM = outer liner + inner liner + medium x take-up factor + glue. Weight = estimated blank area x board GSM. The RSC blank uses two length and two width panels, one width of top/bottom flaps, and the entered tab/allowances.

Worked example. The starting board inputs give 175 + (140 x 1.43) + 175 + 10 = 560.2 gsm. The calculator multiplies that grammage by the estimated blank area, then by quantity, before applying the entered material cost per kg.

The result above uses these exact values. This snapshot is included when the page is printed so the output can be checked against the original measurements.

Box length

575 mm

Box width

385 mm

Box height

225 mm

Blank allowance per panel

3 mm

Glue tab

40 mm

Outer liner

175 gsm

Inner liner

175 gsm

Fluting medium

140 gsm

Flute take-up factor

1.43

Glue contribution

10 gsm

Box quantity

100

Material cost per kg

1

Primary result: Each box: 681 g.

• Measure from the datum or reference edge described by this tool, and do not mix inside, outside and centerline dimensions.
• Keep inputs in the displayed units and preserve more precision than the final cutting or purchasing tolerance requires.
• When the result is close to a limit, verify it with a test piece, field measurement, manufacturer drawing or qualified project professional.

This estimates material weight, not compression strength or a production quotation. Trim, slots, manufacturer allowances, moisture, coatings, ink and measured take-up change actual mass. Replace every nominal input with supplier data before costing production.