What can a Terran afford?

Buildings	Units produced
Command Centers	Only SCVs
Barracks	Only Marines
Barracks w/ Reactor	Only Marines
Barracks w/ Tech Labs	M	Md	R	G
Factories	Only Hellions
Factories w/ Reactor	Only Hellions
Factories w/ Tech Labs	H	ST	T
Starports	V	Me
Starports w/ Reactor	V	Me
Starport w/ Tech Labs	V	Me	R	B	BC

Include the cost of supply depots required

	Mineral patches	SCVs on minerals	MULE	Geysers used
Normal base

Click here for more bases or fewer bases.

With this distribution, your income will be ? minerals per second and ? gas per second. You can find the math behind the income per SCV in this article.

Below is the amount of resources used to produce your army, assuming that all buildings are continually producing units.

Resource	Mined	Consumed	Surplus	Consumed / Mined
Minerals	? / sec	? / sec	? / sec	?
Vespene Gas	? / sec	? / sec	? / sec	?

What this means is that continually producing units from all buildings costs ? than your bases will produce.

There are additional places to sink your resources into, such as new buildings, expansions and upgrades, which will limit the amount of resources available for growing your army. It's also quite alright if the percentage of resources you can spend exceeds 100%. In many circumstances, buildings may be idle for short periods. It's usually better to have a bit too much production capacity.

N.B. All calculations above assume the game speed is set to Normal. On Faster speed, which is common for ladder games, everything is 21% faster. You mine 21% more per second, and you produce units 21% faster. For the purpose of comparing the resources mined to the resources spent, this balances out.

If you were able to afford continually producing units from all buildings, you would produce:

1.1.0

Updated to follow Patch 1.2.0

1.0.1

Fixed: If last base was high yield, all patches in previous bases would also be counted as high yield (thanks to alcapwned).