I found this calculator on Wikivorce
https://divorce.wikivorce.com/divorce-calculator/divorce-calculator.html
What happens to the home? Who will stay in it? Will it be sold? How will the equity be divided?
How will pensions be treated? Will they be shared?
How will savings and investments be divided?
Will there be any child or spousal maintenance payable? How much and for how long?
The actual calculator: https://divorce.wikivorce.com/divorce-calculator/divorce-calculator-start.html
You provide details about your / your spouse's income, outgoings, children, assets & liabilities - it then provides an estimated settlement
Some other calculators I've found
https://www.winstonsolicitors.co.uk/divorce-calculator.html
Does anyone have any links to any other calculators or Excel spreadsheet templates?