OSRS Plank Make Calculator

How planks are made

There are seven planks, each sawn from its own log. A sawmill operator turns a log into a plank for a fee, and the Plank Make spell does it anywhere for 70% of that fee plus the runes. Sawmill coupons from Sailing pay the fee for you at a sawmill; there is none for rosewood.

The four sawmills

Every sawmill charges the same fee and they share one stock. What makes one faster than another is how far it is from a bank:

Auburnvale is the closest, which is why it is the fastest on foot: about 5,400 planks an hour, and 6,400 with a log basket and a plank sack. The Lumber Yard is far from a bank, so players reach it by teleport: with the ring of the elements, a log basket and a plank sack it does 6,900 an hour, the fastest way there is. By balloon from Castle Wars a run carries 27 logs in Graceful, 25 with a spottier cape and boots of lightness and 20 without weight-reducing clothing. A sawmill voucher from the Forestry Shop gives two planks for one log and one fee, if there is room for the second plank: with vouchers, an inventory that held 27 logs holds 13 logs and makes 26 planks.

Plank Make

Plank Make is a Lunar spell that needs 86 Magic and Dream Mentor. It turns one log into a plank for 2 astral runes, 1 nature rune and 70% of the sawmill fee, and pays 90 Magic experience. Cast by hand it is about 1,844 casts and 166,000 experience an hour; left to autocast, about 1,000 casts. From 86 to 99 Magic takes 104,852 casts. With a sawmill voucher each cast makes two planks for the experience of one. An earth staff or a charged tome of earth pays the earth runes, dust, mud or lava runes can stand in for them, and Bryophyta's staff saves one nature rune in 15, though it takes the hand an earth staff would.

Servants and the sawmill

The cook, the butler and the demon butler will take logs to the sawmill while you build. They charge the sawmill fee and their wage, paid after every 8 jobs, from your inventory or a servant's money bag (58 Construction). Noted logs take two jobs: one to un-note them and one to take them to the mill. With the logs in your inventory the servant goes while you bank for the next load. A servant cannot use sawmill vouchers.

Plank questions

What is the cheapest way to get planks? It depends on the day's prices; the table above compares every way for the plank you pick. Plank Make saves 30% of the fee but costs runes, so for cheap planks the sawmill usually wins and for mahogany and up the spell often does.

Which sawmill is closest to a bank? Auburnvale, about 26 steps. The Woodcutting Guild is next at 44, then Prifddinas at 60 and the Lumber Yard at 89.

Can I buy planks from a shop? Razmire Builders Merchants in Mort'ton sells regular planks after Shades of Mort'ton: 10 at a time for 10 coins, one coming back every 10 minutes, so players buy them out and move to another world. That is about 1,500 planks an hour at 24 seconds a world.

Can I pick planks up? Four regular planks lie outside the Barbarian Agility course at the Barbarian Outpost. Taking them and moving world by world comes to about 600 planks an hour, for nothing. One teak plank lies in the Prifddinas sawmill, out of reach except to Telekinetic Grab (33 Magic, a law rune and an air rune a cast).

Do monsters drop planks? 60 monsters, bosses and rewards give planks, from revenants and Vet'ion to Sailing salvage, port reward bags, lost crates, clue caskets and Barbarian Assault gambles. Pick one under Drops and salvage and the page works out the planks a kill or an opening gives and how many an hour at your pace, with what the rest of the loot sells for taken off the cost unless you untick it. Drops count towards the cheapest way only when you pick that way, since they come with whatever else you are doing.

Where do sawmill coupons come from? Sailing: shipwreck salvage, lost crates and courier tasks. They cannot be traded and cannot be used with Plank Make.

What do I build with them? The Construction calculator plans a level with every piece of furniture, and the Mahogany Homes calculator plans contracts tier by tier; both are in the Build list above.