To make concrete in Minecraft, you follow these steps:

1. Craft Concrete Powder

• Gather 4 blocks of sand and 4 blocks of gravel. Both are common and can be found in various biomes like deserts, beaches, rivers, and oceans.
• Obtain a dye of your choice to determine the concrete color. There are 16 dye colors available, such as red, blue, yellow, white, black, and more.
• Open a crafting table and place the 4 sand blocks, 4 gravel blocks, and 1 dye anywhere in the 3x3 crafting grid. The arrangement doesn't matter.
• This crafting recipe yields 8 blocks of colored concrete powder

2. Convert Concrete Powder to Solid Concrete

• Take the concrete powder to a water source (like a river, ocean, or infinite water source).
• Place the concrete powder block so that it touches water. Upon contact, the powder instantly hardens into solid concrete.
• You can place the powder directly in water or let it fall onto water (concrete powder behaves like sand and gravel and falls due to gravity).
• Note that water bottles, rainfall, or water in cauldrons do not convert concrete powder to concrete.
• Once solidified, mine the concrete blocks with a pickaxe to collect them for building

Tips for Making Concrete Efficiently

• To make large amounts quickly, build a platform one block above water and place concrete powder on it. Then remove the platform so the powder falls into water and hardens.
• Use an Efficiency-enchanted pickaxe or a Haste beacon to speed up mining the concrete blocks

This process works in both Java and Bedrock editions of Minecraft

. In summary, concrete is made by crafting concrete powder from sand, gravel, and dye, then hardening the powder by placing it in water, and finally mining the hardened concrete for use in construction.