High Alchemy Calculator
What to alch for your Magic goal
Example plan: Magic 55 to 99
Magic to Cast High Level Alchemy ->
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38,446 gp Rune platebody
worn Fire staff
Rune platebody gains 416 gp per cast.
Example prices: 23 Oct, 08:00 UTC.
197,967 casts to 99.
Buy limit: 70 every 4 hours: at least 471 days of buying to reach 99.
First buy: 2.7M gp.
Other items to alch now
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What this plan does not count
- Trade volume beyond the ranking screen: offers may still fill slowly or at a different price.
- Price changes during your plan.
- Items with no price or an old price: not ranked.
- Items you already bought in the last 4 hours (they use up the limit).
- Bryophyta's staff, Explorer's ring, tele-alching and stun-alching.
- 1,200 casts per hour is non-stop. Breaks are slower.
How this is worked out
- 65 Magic XP per cast, Magic 55, 1 nature rune and 5 fire runes per cast, about 1,200 casts per hour non-stop: OSRS Wiki, High Level Alchemy (revision 15362543).
- Coins per cast: the item's high alch value, 60% of its store value, from the OSRS Wiki item mapping.
- Gain per cast = high alch value − item price − nature rune price (− 5 fire runes without a staff). No GE tax: nothing is sold.
- Casts per 4 hours: the item's GE buy limit, at most 4,800.
- The ranked list leaves out items whose last-24-hour GE volume (OSRS Wiki real-time prices, /volumes) is less than six times their casts per 4 hours. Search still finds them.
- Each item uses its GE instant-buy price and shows how old that price is. A price over 48 hours old is not used.
Buy limits and how fast you can alch
High Level Alchemy is a standard-spellbook Magic spell. It needs Magic 55 and costs 1 nature rune and 5 fire runes per cast, or only the nature rune with a fire staff or tome of fire. It turns one item into coins worth 60% of its value and gives 65 Magic XP. You can buy each item only up to its GE buy limit every 4 hours, so a low-limit item caps how fast you can alch it: a limit of 70 means at most 70 casts every 4 hours. See other ways to train Magic.
High Alchemy FAQ
How much XP does High Alchemy give?
65 Magic XP per cast. Non-stop, at about 1,200 casts per hour, that is about 78,000 XP per hour.
How many casts from 55 to 99 Magic?
197,967 casts, and the same number of nature runes. That is about 165 hours at 1,200 casts per hour non-stop, if buy limits do not slow you down.
Which items are best to high alch?
It changes with GE prices and buy limits, so no item stays best. The list on this page shows each item's gain per cast at the price time shown, with the age of each price.
Do I need fire runes for High Alchemy?
Each cast needs 5 fire runes and 1 nature rune. A staff of fire or a charged tome of fire supplies the fire runes, so you only buy nature runes.
Why does the buy limit matter?
You can buy each item only up to its GE buy limit every 4 hours. Rune platebody's limit is 70, so you can alch at most 70 every 4 hours, far below 1,200 casts per hour.
Is there GE tax on high alching?
No. GE tax applies when you sell an item on the Grand Exchange. Alching turns the item into coins without a sale.
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