Lactated Ringer's Solution Fluid Therapy Calculator
Reference Source
Saunders Handbook of VETERINARY DRUGS, Page 462-463
Important Safety Information
Monitor for signs of fluid overload including increased respiratory rate, coughing, and edema.
Adjust rates based on ongoing losses, urine output, and clinical response.
Use with caution in animals with cardiac, renal, or hepatic impairment.
About Lactated Ringer's Solution
Lactated Ringer's Solution is a veterinary drug in the crystalloid fluid replacement solution class.
This calculator gives doses for dogs, cats, horses, cattle, pigs, calves and foals. Every dose it uses is taken from the Saunders Handbook of Veterinary Drugs (page 462-463) and is shown in full in the dosage tables on this page.
How to Use the Lactated Ringer's Solution Dosage Calculator
- Select the animal type.
- Enter the body weight and choose kg or lb. Pounds are converted to kilograms automatically (1 kg = 2.205 lb).
- Click “Calculate Dosage”. The result shows the total dose, the dose rate it was based on, the route and how often to give it.
How the Lactated Ringer's Solution Dose Is Calculated
Example: for a 10 kg (22 lb) dog, the calculator gives Rate: 5-10 mL/kg/hr Total Volume: 50.0 - 100.0 mL/hr Route & Frequency: IV (initial 5 mL/kg/hr, increase to 10 mL/kg/hr if needed).
Always check the strength of the product you are using (for example mg per tablet or mg per mL) before converting the dose into tablets or millilitres.
Weight Unit Converter ▲
Weight Unit Converter ▼
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Standard Fluid Therapy Guidelines
Small Animal Fluid Therapy
| Species | Condition | Dosage | Route & Frequency |
|---|---|---|---|
| Dogs | Moderate Dehydration | 15-30 mL/kg/hr | IV |
| Severe Dehydration | 50 mL/kg/hr | IV | |
| Maintenance | 2-6 mL/kg/hr | IV, SQ, or IP | |
| During Anesthesia | 5-10 mL/kg/hr | IV | |
| Shock Therapy | 90 mL/kg | IV | |
| Cats | Moderate Dehydration | 15-30 mL/kg/hr | IV |
| Severe Dehydration | 50 mL/kg/hr | IV | |
| Maintenance | 2-3 mL/kg/hr | IV, SQ, or IP | |
| During Anesthesia | 3-10 mL/kg/hr | IV | |
| Shock Therapy | 60-70 mL/kg | IV |
Large Animal Fluid Therapy
| Species | Condition | Dosage | Route & Frequency |
|---|---|---|---|
| Horses, Cattle, Pigs | Moderate Dehydration | 15-30 mL/kg/hr | IV |
| Severe Dehydration | 50 mL/kg/hr | IV | |
| Maintenance | 40-50 mL/kg/day | IV | |
| Calves & Foals | Moderate Dehydration | 45 mL/kg at 30-40 mL/kg/hr | IV |
| Severe Dehydration | 80-90 mL/kg at 30-80 mL/kg/hr | IV |
Frequently Asked Questions
What is the Lactated Ringer's Solution dose for dogs?
- Condition: Moderate Dehydration; Dosage: 15-30 mL/kg/hr; Route & Frequency: IV
- Condition: Severe Dehydration; Dosage: 50 mL/kg/hr; Route & Frequency: IV
- Condition: Maintenance; Dosage: 2-6 mL/kg/hr; Route & Frequency: IV, SQ, or IP
- Condition: During Anesthesia; Dosage: 5-10 mL/kg/hr; Route & Frequency: IV
- Condition: Shock Therapy; Dosage: 90 mL/kg; Route & Frequency: IV
What is the Lactated Ringer's Solution dose for cats?
- Condition: Moderate Dehydration; Dosage: 15-30 mL/kg/hr; Route & Frequency: IV
- Condition: Severe Dehydration; Dosage: 50 mL/kg/hr; Route & Frequency: IV
- Condition: Maintenance; Dosage: 2-3 mL/kg/hr; Route & Frequency: IV, SQ, or IP
- Condition: During Anesthesia; Dosage: 3-10 mL/kg/hr; Route & Frequency: IV
- Condition: Shock Therapy; Dosage: 60-70 mL/kg; Route & Frequency: IV
What is the Lactated Ringer's Solution dose for horses, cattle, pigs?
- Condition: Moderate Dehydration; Dosage: 15-30 mL/kg/hr; Route & Frequency: IV
- Condition: Severe Dehydration; Dosage: 50 mL/kg/hr; Route & Frequency: IV
- Condition: Maintenance; Dosage: 40-50 mL/kg/day; Route & Frequency: IV
What is the Lactated Ringer's Solution dose for calves & foals?
- Condition: Moderate Dehydration; Dosage: 45 mL/kg at 30-40 mL/kg/hr; Route & Frequency: IV
- Condition: Severe Dehydration; Dosage: 80-90 mL/kg at 30-80 mL/kg/hr; Route & Frequency: IV
Can I enter the weight in pounds?
Yes. Choose “lb” next to the weight field; the calculator converts pounds to kilograms (1 kg = 2.205 lb) before calculating.
Where do these Lactated Ringer's Solution doses come from?
From the Saunders Handbook of Veterinary Drugs (page 462-463). The full dosage tables are shown on this page.
Can this calculator replace my veterinarian’s advice?
No. It is a reference tool. Dose, product and route should always be confirmed by a licensed veterinarian who has examined the animal.
Medical Disclaimer
This Lactated Ringer's Solution dosage calculator is an educational reference based on the Saunders Handbook of Veterinary Drugs (page 462-463). It does not replace a veterinary examination, diagnosis or prescription. Approved uses, product strengths and withdrawal times differ between products and countries. Not for human use.