Planning tools

Independent reading and planning resources. Check the linked original sources before making decisions.

Transparent arithmetic

Complete kit allowance

Add your own confirmed device, keyboard, adapter and delivery amounts in pounds. The example is hypothetical; this is not a live offer, value ranking or compatibility result.

Device allowance (£)Keyboard or case allowance (£)Adapter allowance (£)Delivery allowance (£)

Each amount: 0–10,000,000. Use the same currency or mass unit throughout. Blank values are invalid.

Kit allowance = device + keyboard/case + adapter + delivery.

Transparent arithmetic

Carried kit mass

Add measured or clearly sourced component masses in grams. Keep the device, input accessory, charger and sleeve separate. The result is arithmetic, not an airline allowance or a comfort assessment.

Device mass (g)Keyboard or case mass (g)Charger and cable mass (g)Sleeve mass (g)

Each amount: 0–10,000,000. Use the same currency or mass unit throughout. Blank values are invalid.

Mass = component sum; outputs rounded to 2 decimal grams and 3 decimal kilograms. Kilograms = grams ÷ 1,000.

Transparent arithmetic

Nominal pixel density

Calculate the pixel diagonal divided by the published screen diagonal in inches. Rounded manufacturer inputs do not create an exact measurement. PPI does not predict text comfort or recommend a scaling setting.

Horizontal native pixelsVertical native pixelsPublished diagonal (in)

Whole-number pixel counts: 1–20,000. Diagonal: greater than 0 and no more than 100 inches. Blank values are invalid.

PPI = √(horizontal² + vertical²) ÷ diagonal inches.