diff --git a/web/cashtab/src/hooks/__tests__/migrations.test.js b/web/cashtab/src/hooks/__tests__/migrations.test.js
--- a/web/cashtab/src/hooks/__tests__/migrations.test.js
+++ b/web/cashtab/src/hooks/__tests__/migrations.test.js
@@ -35,6 +35,14 @@
             new BigNumber('10012'),
         );
     });
+    it(`toSmallestDenomination() returns expected value if input is a BigNumber with 1 decimal place`, () => {
+        const { toSmallestDenomination } = useBCH();
+
+        const testInput = new BigNumber('100.1');
+        expect(toSmallestDenomination(testInput, 8)).toStrictEqual(
+            new BigNumber('10010000000'),
+        );
+    });
     it('toSmallestDenomination() returns exact result as toSatoshi but in BigNumber format', () => {
         const BCH = new BCHJS();
         const { toSmallestDenomination } = useBCH();
diff --git a/web/cashtab/src/hooks/useBCH.js b/web/cashtab/src/hooks/useBCH.js
--- a/web/cashtab/src/hooks/useBCH.js
+++ b/web/cashtab/src/hooks/useBCH.js
@@ -416,10 +416,10 @@
         // Output: a BigNumber of the amount of satoshis to be sent, or false if input is invalid
 
         // Validate
-        // Input should be a BigNumber with cashDecimals decimal places
+        // Input should be a BigNumber with no more decimal places than cashDecimals
         const isValidSendAmount =
             BigNumber.isBigNumber(sendAmount) &&
-            sendAmount.dp() === cashDecimals;
+            sendAmount.dp() <= cashDecimals;
         if (!isValidSendAmount) {
             return false;
         }