Side Hustle ROI Calculator

First, the calculator converts your “time per unit” (minutes/unit) into hours per unit and subtracts any optional overhead time from your available hours. It then estimates expected units = (net available hours) ÷ (hours per unit). Revenue and variable costs are calculated as units × revenue/unit and units × variable cost/unit, and net profit per hour is net profit ÷ available time.

This tool assumes a constant output rate across your time window, fixed revenue per unit, and variable costs that scale linearly with how many units you produce. It does not include taxes, platform fees, demand limits (capacity beyond your time), churn, or learning curve effects—so use it for “expected” comparisons, not full accounting. If collectible revenue or time per unit varies a lot in real life, the ranking may change.

If your net available hours (available time minus overhead time) is zero or negative, the hustle is marked invalid for your time. If variable cost per unit is greater than or equal to revenue per unit, the calculator flags the hustle as break-even or unprofitable (hourly net profit will be ≤ 0). Also make sure overhead time isn’t higher than your available time, and that time per unit and available time are greater than zero.

When revenue per unit is 0, net profit will be negative (unless variable cost is also 0). Very small “time per unit” values can produce high expected unit counts—use realistic estimates. If variable costs are 0, hourly net profit becomes effectively revenue per unit expressed per hour, which may overstate reality if you later discover hidden costs.