City Building Output Calculator

How to Use This Tool

Follow these steps to calculate your city building output:

• Select your building type from the dropdown menu (Residential, Commercial, Industrial, etc.)
• Enter the base output per cycle for a single building (e.g. 10 resources per in-game hour)
• Input the total number of that building type in your city or campaign settlement
• Choose the cycle type that matches your game or tabletop system
• Select any active output multipliers (buffs, upgrades, policies) and RNG variance ranges
• Click the Calculate Output button to view detailed breakdowns
• Use Reset to clear all fields, or Copy Results to save your calculations

Formula and Logic

All calculations use the following core logic:

• Total Base Output = Base Output per Cycle × Number of Buildings
• Adjusted Output = Total Base Output × Selected Multiplier
• Variance Range = Adjusted Output × (1 ± Selected Variance Percentage)
• Output per In-Game Hour converts your cycle type to hourly equivalent (e.g. in-game minute cycles multiply by 60 to get hourly output)

For tabletop turns, hourly output is marked as N/A since turns are not time-based.

Practical Notes

• Many city building video games apply hidden multipliers based on city policies, adjacency bonuses, or worker efficiency – add these to your multiplier selection if applicable
• RNG variance values should match your game’s current patch: some updates reduce random output swings for balance
• Tabletop game masters can use this tool to balance homebrew city modules, ensuring resource output doesn’t break campaign economies
• Competitive city builder players can use the variance range to plan for worst-case scenarios during tournament runs
• Residential building output typically refers to population housed, not resources – adjust your base output units accordingly

Why This Tool Is Useful

City building games often have opaque output math, making it hard to plan large-scale cities without trial and error.

This tool eliminates guesswork for gamers optimizing production chains, game designers balancing homebrew content, and streamers explaining mechanics to their audience.

It accounts for common game mechanics like buffs, RNG variance, and time cycle differences that generic calculators ignore.

Frequently Asked Questions

Does this tool work for all city building games?

It works for any video game or tabletop system that uses per-cycle building output, including SimCity, Cities: Skylines, Foundation, and D&D’s Strongholds & Followers modules. You may need to adjust multiplier values to match your game’s specific buff rules.

How do I account for adjacency bonuses?

Adjacency bonuses (e.g. industrial buildings next to power plants) are applied as multipliers – if a bonus gives 20% extra output, select the Major Boost (1.5x) option if combining with other buffs, or add a custom multiplier if your game allows.

What if my game has no RNG variance?

Select the "None (0%)" option in the RNG Variance dropdown – this will set your minimum and maximum output equal to your adjusted output, removing random range calculations.

Additional Guidance

• Save your calculations for different city builds to compare output efficiency between building types
• Check your game’s latest patch notes before finalizing builds – multiplier values and base output are often adjusted for balance
• For tabletop use, confirm with your game master what cycle length a "turn" represents to get accurate hourly conversions
• Use the copy-to-clipboard feature to share output breakdowns with teammates or your streaming audience