Clear math for long-term investors.

Project dividend income and portfolio growth, with or without DRIP.

Profit, return and breakeven on a stock trade, after fees and tax.

Average cost per share across buys, and how many shares to buy to hit a target.

Profit, loss and breakeven at expiration for calls, puts and spreads.

Tax on selling stocks, funds or property — short-term, long-term and home sales.

What a bond is worth, its yield to maturity, current yield and duration.

Find out if you can stop saving and still retire on time.

How much you can contribute this year, and what your Roth IRA could grow to.

Federal tax, state tax and the 10% early-withdrawal penalty on a 401(k) withdrawal.

See exactly what a certificate of deposit will earn by maturity.

What your I bond or EE bond is worth today, using official Treasury rates.

How much college could cost, and how much to save each month to get there.

How many years it takes your money to double — and the rate you need.