RM43 Mix Ratio Calculator
Work out exactly how much RM43 to add to your sprayer for total vegetation control or spot treatment, based on the manufacturer’s labeled mix ratios.
Treatment & Sprayer Details
Choose your treatment type and enter your sprayer or area details
Bare ground rate is based on square footage. Spot treatment rate is based on your sprayer’s water volume.
Total square footage of the driveway, fence line, or bare ground you want to clear.
Label allows 1–10 gallons of water per 1,000 sq ft depending on your sprayer type and speed.
Total capacity of your backpack or pump-up sprayer, filled with water.
RM43 typically needs only one application per year. Multiple applications may exceed the label’s maximum rate.
Your RM43 Mix Ratio
Exact product and water amounts for your sprayer
Enter your treatment type and sprayer or area details above, then click Calculate Mix Ratio to see exactly how much RM43 to use.
RM43 Mixing Ratios at a Glance
These figures reflect the standard RM43 product label. Always confirm against the label on your own container before mixing.
| Use Case | Mix Ratio | Context / Details |
|---|---|---|
| Total Vegetation Control (Bare Ground) | 7.4 oz / 1,000 sq ft | Diluted in 1–10 gallons of water |
| Spot Treatment (Brush, Vines, Weeds) | 6 oz / gallon | Spray foliage to wet thoroughly |
| Maximum Annual Rate | 2.5 gal / acre / year | Equal to 7.4 oz per 1,000 sq ft per year |
| Rainfast Time | 2 hours | Avoid rain or irrigation before this passes |
| Standard Container Sizes | 1 gal / 2.5 gal | Equal to 128 oz / 320 oz of concentrate |
RM43 Mix Ratio FAQ
Everything you need to know about diluting, mixing, and applying RM43 correctly.
For total vegetation control on bare ground, mix 7.4 fluid ounces of RM43 per 1,000 square feet, diluted into 1 to 10 gallons of water depending on your sprayer. For spot treatment of brush, vines, and tough weeds, use 6 fluid ounces of RM43 per 1 gallon of water instead.
For spot treatment, a 4-gallon sprayer needs 24 fluid ounces of RM43 (6 oz per gallon multiplied by 4 gallons). For bare ground control, the amount depends on how much area that 4 gallons is meant to cover, since the product rate is tied to square footage rather than tank size.
No. The maximum labeled rate is 2.5 gallons of product per acre per year, equal to 7.4 fluid ounces per 1,000 square feet per year. Exceeding this rate is against federal label law and can damage soil, nearby plants, and waterways without improving results.
One gallon of RM43 (128 fluid ounces) covers roughly 17,000 square feet at the standard bare ground rate of 7.4 fluid ounces per 1,000 square feet, which works out to about 2.5 gallons of product per acre.
No. RM43 combines glyphosate with imazapyr and a soil-active preventer, giving it season-long, non-selective control that can last up to a year. Standard Roundup formulas are glyphosate-only and break down faster, so they don’t stop regrowth the way RM43 does.