The quick answer
Wash the mango, steady it on a board and cut the two fleshy cheeks away from its flat central pit. Score each cheek on the board without piercing the skin, then scoop out cubes or slices with a spoon. Trim edible flesh from around the pit separately.
In this guide
Choose a mango you can handle
For neat cubes, choose fruit that gives slightly when gently squeezed but still holds its shape. A very soft mango is better scooped for a smoothie or sauce. Peel color varies by variety and is not a dependable ripeness test.
Wash the whole fruit before cutting, even though you will discard the skin. Use a clean board and knife, especially after handling raw meat. Keep the board still and dry sticky juice from your knife handle before continuing.
Work around the pit
Orient the fruit
The pit is broad, flat and elongated. Steady the mango on the board, making a small flat base if necessary. Start just to one side of the central line.
Remove one cheek
Slice down beside the pit rather than forcing the blade through it. If you hit hard resistance, move the blade slightly outward. Keep your holding hand clear of its path.
Repeat on the other side
Turn the fruit and remove the second cheek. The middle section contains the pit and a rim of usable flesh.
Trim the middle
Lay the remaining section securely on the board. Carefully trim accessible flesh from its edge and remove the skin from those strips. Do not chase tiny pieces while gripping a slippery pit.
Cut cubes or slices on the board
Place a cheek skin-side down on the board. For cubes, score parallel shallow lines in one direction, then across them. For slices, make only the parallel cuts. Stop before the blade pierces the peel; use a spoon to lift out the flesh.
Avoid scoring a cheek held in your palm. If the mango is too soft to score cleanly, simply scoop its flesh. Firm fruit can be peeled and sliced on a flat base, but a slippery peeled mango needs extra care.
Use the cut fruit
Keep cut mango in a covered container in the refrigerator and use it promptly. Freeze separated cubes on a tray before packing for smoothies so they do not form one large block. For fruit salads, cut fairly even pieces rather than thin fragile slivers.
A few useful answers
Can you eat mango skin?
This cutting guide removes the peel. People with sensitivity to mango peel should avoid handling or eating it and follow their usual allergy advice.
Why does my knife stop in the middle?
It is probably contacting the pit. Move outward rather than applying more force.
Use the full recipe alongside these tips, and follow the stated care and safety limits of your equipment.