--- title: "Simple Interest Calculator | Desert Rock Capital" url: "https://www.desertrockcapital.com/calculators/simple-interest" description: "Calculate simple interest and the total amount from a principal, annual rate, and time. General educational math tool." --- Interest tool # Calculate simple interest. Simple interest is charged only on the original amount. Enter a principal, annual rate, and time to see the interest and total. See if you qualify All calculators Principal $ Annual interest rate % Time Time unit ### Results Fill in the fields to see the result. The math runs instantly in your browser; nothing you type is saved or sent. A general-purpose math tool. It runs standard math on the numbers you enter, including a rate you choose yourself. Nothing is pre-filled. It is not an offer, quote, rate, approval, or estimate of any Desert Rock Capital loan. A general math tool. Desert Rock Capital loans are installment loans, not single simple-interest lump sums, so this does not represent DRC pricing. The calculator above is a general math tool and is separate from any Desert Rock Capital loan. Desert Rock Capital lends $100 to $3,000 in Utah with no credit check and fixed biweekly payments; the amount offered, if approved, is shown to you up front, and every payment is in writing before you sign. ## How the math works I = P x r x t; total = P x (1 + r x t) Simple interest multiplies the principal by the annual rate and the time in years. Unlike compound interest, it never charges interest on previously accrued interest. Desert Rock Capital is a licensed Utah consumer lender. Our product is a personal installment loan of $100 to $3,000, with no credit check, no collateral, and fixed biweekly payments, for Utah residents. This is a general simple-interest math tool and does not represent Desert Rock Capital pricing; our loans are amortized installment loans. It is educational only. Other lenders and products calculate costs differently, and your actual terms depend on your own agreement. We use the standard formula cited below so the math is transparent and not our invention. Source: [Simple interest (University of Northern Iowa)](https://www.math.uni.edu/~campbell/mdm/simp.html) ## Questions, answered plainly ### Does this represent a Desert Rock Capital loan? ### What is simple interest? ### When is simple interest used? It appears in some short-term loans and basic interest examples; many real loans use amortization instead. Certificate of Deposit (CD) Compound Interest What you need to apply Ready for the real number? ## Book a time at a Utah branch. We will walk the real schedule with you, in writing, before you sign anything. Booking a time is not a loan decision. No credit check, and a clear decision usually in about 30 minutes. Step 1 of 3 Branch & details ## Which branch, and who's coming in? Pick the location that works for you. Booking a time is not a loan decision. Choose a branch First name * Last name * Email * Phone * I accept the Terms of Service and Privacy Policy * By checking this box, I acknowledge that I have reviewed and agree to be bound by Desert Rock Capital's Terms of Service and Privacy Policy . This includes: - The Mandatory Arbitration Agreement, which requires disputes to be resolved through individual arbitration rather than court or class action - The terms governing contact, communications, and use of my information - All other terms and conditions applicable to my inquiry and any future loan relationship I understand I may opt out of the Arbitration Agreement within 30 days by sending written notice to help@desertrockcapital.com . I consent to receive calls, texts, and emails * I authorize Desert Rock Capital to contact me at the phone number(s) and email address I provide for marketing, informational, and service-related purposes. This consent is not required as a condition of purchasing any goods or services from Desert Rock Capital. This contact may include: - Voice calls, including calls placed using automatic telephone dialing systems (ATDS), artificial intelligence (AI), predictive dialers, or prerecorded/artificial voice messages - Text messages (SMS/MMS) sent via automated systems - Emails related to my inquiry and loan products I understand: - Contact frequency varies; I may receive an average of 5 to 10 text messages per week and multiple voice calls per week - Standard message and data rates charged by my wireless carrier may apply - I can revoke this consent at any time by replying "STOP" to text messages or calling [801-377-3333](tel:+18013773333) - I may be contacted even if my phone number is on a state or federal Do Not Call registry - My wireless carrier is not liable for delayed or undelivered messages By providing my contact information and checking this box, I am providing my express written consent to be contacted as described above. Prefer to talk first? Call 801-377-3333 ## The math is free. So is a straightforward decision. Apply online or visit a branch in Salt Lake City, Orem, or St. George. No credit check, not based on your credit score, and you get a clear decision in about 30 minutes. Start your application