diff --git a/web/cashtab-components/src/utils/__tests__/cashtab-helpers.test.ts b/web/cashtab-components/src/utils/__tests__/cashtab-helpers.test.ts
--- a/web/cashtab-components/src/utils/__tests__/cashtab-helpers.test.ts
+++ b/web/cashtab-components/src/utils/__tests__/cashtab-helpers.test.ts
@@ -1,9 +1,33 @@
-import { buildPriceEndpoint } from '../cashtab-helpers';
+import {
+    buildPriceEndpoint,
+    priceToSatoshis,
+    adjustAmount,
+} from '../cashtab-helpers';
 
-describe('Component helper functions', () => {
-    it('Uses expected price endpoint', () => {
+describe('Helper functions match expected performance', () => {
+    it('Component uses expected price endpoint', () => {
         expect(buildPriceEndpoint('USD')).toBe(
             'https://api.coingecko.com/api/v3/simple/price?ids=bitcoin-cash-abc-2&vs_currencies=USD&include_last_updated_at=true',
         );
     });
+
+    it('Correctly returns BCHA amount in satoshis given (1) fiat price of BCHA and (2) fiat amount of requested satoshis', () => {
+        expect(priceToSatoshis(20, 10)).toBe(50000000);
+    });
+
+    it('Converts amount in satoshis as number to amount in BCHA as string', () => {
+        expect(adjustAmount(50000000, 8, true)).toBe('0.5');
+    });
+
+    it('Converts amount in BCHA as number to amount in satoshis as string', () => {
+        expect(adjustAmount(0.5, 8, false)).toBe('50000000');
+    });
+
+    it('Converts amount in base unit of arbitrary decimal places as number to amount in as string', () => {
+        expect(adjustAmount(50000000, 10, true)).toBe('0.005');
+    });
+
+    it('Converts amount with arbitrary decimal places as number to amount as base unit (no decimal places) as string', () => {
+        expect(adjustAmount(0.005, 10, false)).toBe('50000000');
+    });
 });