Is there a 2025 W4 calculator anywhere that works?

Is there an updated 2025 W4 calculator I can use?

I am planning to file married jointly for the first time, and want to update our W4s. I tried using the IRS calculator, but it seemed broken. It correctly had my yearly income, but only had my partner’s year to date income as the final result. So I can’t rely on this to know any extra withholding/credits to claim.

Is there a calculator, or possibly just an excel/sheets document I can use to calculate how to fill out the W4s for the next tax year?