Why should a P&C agency put life and health calculators on its website?
Because the household is already your client. Clients with more than one line tend to be easier to keep, and life, disability and long-term care are the lines P&C books most often leave to someone else. A calculator lets the client discover the gap privately, then ask you about it, so the cross-sell feels like service rather than a pitch.
Start with the life insurance needs calculator: it asks for mortgage balance and other debts, which your homeowners clients understand immediately. The disability calculator follows naturally for self-employed clients and tradespeople.