Work out what pays off before you spend the gold. The calculators use live data from the game.
Which cart is cheapest for your route, how long the haul takes and when it beats buying at the market.
What a cart costs including all parts and how many rounds it takes to earn that back.
How long a cart takes to fill, what wait limit to set and how many mines it can serve.
How many attacks your army needs against a building's tower and what it will cost.
What each building level costs, how long it takes to pay off and whether to upgrade or build another.
What training costs, how long it takes and which unit gives the most for the gold.