Concrete Ratio Calculator
Calculate cement, sand, and gravel proportions for any concrete grade. Select a mix design (M10 to M25), enter the volume you need, and get exact material quantities in kilograms — with live mix proportion breakdowns.
What is a Concrete Ratio?
A concrete mix ratio defines the relative proportions of cement, sand (fine aggregate), and gravel (coarse aggregate) by volume or weight. Common standard grades include M10 (1:3:6), M15 (1:2:4), M20 (1:1.5:3), and M25 (1:1:2).
The numbers represent Cement : Sand : Gravel parts. Higher cement ratios produce stronger structural concrete, while leaner mixes are used for mass concrete and leveling.
Formula & Persamaan Yang Digunakan
Concrete Ratio Calculator ini menggunakan 5 persamaan utama:
1 Standard Nominal Mix Ratio ▼
M15 (1:2:4) provides ~15 MPa compressive strength. M20 (1:1.5:3) provides ~20 MPa.
2 Water-Cement Ratio (W/C) ▼
Typically 0.45 to 0.55 for structural concrete. Lower W/C yields higher strength.
3 Dry Volume Conversion ▼
Dry ingredients lose ~35% volume when mixed with water and compacted.
Cara Menggunakan Kalkulator Ini
Untuk menggunakan Kalkulator Nisbah ini, ikuti 3 langkah berikut:
Masukkan Nilai
Taip nilai nisbah yang diketahui ke dalam ruang input. Biarkan satu ruang kosong — itu ialah nilai tidak diketahui yang diselesaikan oleh Kalkulator Nisbah.
Pilih Mod
Pilih mod nisbah — Selesaikan, Permudahkan, atau Skalakan. Setiap mod menggunakan persamaan berbeza untuk nilai input anda.
Dapatkan Hasil
Klik Kira. Skrin hasil memaparkan jawapan dengan bar nisbah visual, carta pai, dan pecahan jalan pengiraan langkah-demi-langkah.
Contoh Masalah & Penyelesaian Langkah-demi-Langkah
Berikut ialah 3 contoh masalah dengan penyelesaian langkah-demi-langkah menggunakan Kalkulator Nisbah ini:
Input 1 M15 Mix (1:2:4) for 1 m³ slab
Input 2 M20 Mix (1:1.5:3) for structural beam
Soalan Lazim
What is the standard concrete mix ratio? ▼
The standard concrete mix is 1:2:4 (cement:sand:gravel) for M15 grade, or 1:1.5:3 for M20 grade general structural concrete.
How much cement is needed for 1 m³ of concrete? ▼
For an M15 (1:2:4) mix, you need approximately 320 kg (6.4 bags) of cement per cubic meter.
What is the water-cement ratio? ▼
The water-cement ratio is the weight of water divided by the weight of cement. 0.45-0.50 is standard for durable structural concrete.