Online Colorado alimony calculator from Graham.Law. This Colorado alimony calculator makes Colorado maintenance calculations using the Colorado alimony formula.Calculating alimony in Colorado (CO) involves various state-specific laws and factors. Understanding these elements can help individuals navigate their. Maintenance, or spousal support, is critical when a major life change occurs within family dynamics. Use our Colorado maintenance calculator. Calculate alimony quickly and accurately with our state-specific alimony calculators. Get an estimate based on your state's guidelines for free. Colorado courts take 40 percent of the divorcing couple's combined monthly adjusted gross income (AGI) and subtract the lowerearning spouse's monthly AGI. Estimate how much you and your family will need to contribute for one year at Harvard with our simple Net Price Calculator.