The quick way to scale anything linearly — if 4 lots cost 10 in margin, what do 6 lots need? Enter the known pair and the new value.
If 4 corresponds to 10, then 6 corresponds to 10 × 6 ÷ 4 = 15.
All nine calculators are also in the Growstones app for iPhone and Android — alongside position sizing, a growth simulator and a weekly journal. Your data stays in your iCloud.